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TI-30X Ú
S:
A Guide for Teachers
Developed by
Texas Instruments Incorporated
Activities developed by
Gary Hanson and Aletha Paskett
Illustrated by
Jay Garrison
© 1999 T
EXAS
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NSTRUMENTS
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NCORPORATED
TI-30X ÙS: A Guide for Teachers
ii
About the Authors
Gary Hanson
and
Aletha Paskett
are math teachers in the Jordan Independent School District
in Sandy, Utah. They developed the Activities section and assisted in evaluating the
appropriateness of the examples in the How to Use the TI-30X
Ù
S section of this guide.
Important Notice Regarding Book Materials
Texas Instruments makes no warranty, either expressed or implied, including but not limited to any implied warranties of
merchantability and fitness for a particular purpose, regarding any programs or book materials and makes such materials available
solely
on an as-is basis. In no event shall Texas Instruments be liable to anyone for special, collateral, incidental, or consequential
damages in connection with or arising out of the purchase or use of these materials, and the sole and exclusive liability of Texas
Instruments, regardless of the form of action, shall not exceed the purchase price of this book. Moreover, Texas Instruments shall
not be liable for any claim of any kind whatsoever against the use of these materials by any other party.
Note:
Using calculators other than the TI-30X IIS may produce results different from those described in these materials.
Permission To Reprint or Photocopy
Permission is hereby granted to teachers to reprint or photocopy in classroom, workshop, or seminar quantities, the pages or sheets
in this book that carry a Texas Instruments copyright notice. These pages are designed to be reproduced by teachers for use in
classes, workshops, or seminars, provided each copy made shows the copyright notice. Such copies may not be sold, and further
distribution is expressly prohibited. Except as authorized above, prior written permission must be obtained from Texas Instruments
Incorporated to reproduce or transmit this work or portions thereof in any other form or by any other electronic or mechanical
means, including any information storage or retrieval system, unless expressly permitted by federal copyright law.
Send inquiries to this address:
Texas Instruments Incorporated
7800 Banner Drive, M/S 3918
Dallas, TX 75251
Attention: Manager, Business Services
Note:
If you request photocopies of all or portions of this book from others, you must include this page (with the permission
statement above) to the supplier of the photocopying services.
www.ti.com/calc
ti-cares@ti.com
Copyright © 1999 Texas Instruments Incorporated.
Except for the specific rights granted herein, all rights are reserved.
Printed in the United States of America.
Automatic Power Down, APD, and EOS are trademarks of Texas Instruments Incorporated.
© 1999 T
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TI-30X IIS: A Guide for Teachers
iii
About the Teacher Guide
How the Teacher Guide is Organized
This guide consists of two sections: Activities
and How to Use the TI-30X
Ù
S. The Activities
section is a collection of activities for
integrating the TI-30X
Ù
S into mathematics
instruction. The How To Use the TI-30X
Ù
S
section is designed to help you teach students
how to use the calculator.
Activities
The activities are designed to be teacher-
directed. They are intended to help develop
mathematical concepts while incorporating the
TI-30X
Ù
S as a teaching tool. Each activity is
self-contained and includes the following:
An overview of the mathematical purpose
of the activity.
The mathematical concepts being
developed.
The materials needed to perform the
activity.
The detailed procedure, including step-by-
step TI-30X
Ù
S key presses.
A student activity sheet.
How to Use the TI-30X
Ú
S
This section contains examples on
transparency masters. Chapters are numbered
and include the following.
An introductory page describing the
calculator keys presented in the example,
the location of those keys on the
TI-30X
Ù
S, and any pertinent notes about
their functions.
Transparency masters following the
introductory page and providing examples
of practical applications of the key(s) being
discussed. The key(s) being discussed are
circled on the TI-30X
Ù
S keyboard.
Things to Keep in Mind
While many of the examples on the
transparency masters may be used to
develop mathematical concepts, they were
not designed specifically for that purpose.
For maximum flexibility, each example and
activity is independent of the others.
Select the transparency master
appropriate for the key you are teaching, or
select the activity appropriate for the
mathematical concept you are teaching.
If an example does not seem appropriate
for your curriculum or grade level, use it to
teach the function of a key (or keys), and
then provide relevant examples of your own.
To ensure that everyone starts at the
same point, have students reset the
calculator by pressing
&
and
-
simultaneously or by pressing
%
and then selecting
Y
(yes).
Conventions Used in the Teacher Guide
In the text, brackets [ ] around a key’s
symbol/name indicate that the key is a
second, or alternate, function.
For example:
Z
On the transparency masters, second
functions are shown just as they appear on
the keyboard.
For example:
How to Order Additional Teacher Guides
To place an order or to request information
about Texas Instruments (TI) calculators,
use our e-mail address:
ti-cares@ti.com
visit our TI calculator home page:
www.ti.com/calc
or, call our toll-free number:
1.800.TI.CARES (1.800.842.2737)
© 1999 T
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TI-30X ÙS:
A Guide for Teachers
VI
Table of Contents
About the Authors
ii
About the Teacher Guide
iii
About the TI-30X
Ö
S
iv
Activities
The Better Batter
Using the FIX Key
2
Star Voyage
Using Scientific Notation
6
Trig Functions
10
What’s My Score
1-Variable Statistics
14
Heart Rates
1-Variable Statistics
17
WNBA
Stats
2-Variable Statistics
23
How to Use the TI-30X
Ú
S
1
TI-30X
Ö
S Basic Operations
29
2
Clear, Insert, and Delete
33
3
Basic Math
36
4
Order of Operations and
Parentheses
40
5
Constant
43
6
Decimals and Decimal Places
45
7
Memory
47
8
Fractions
52
9
Pi
58
10
Powers, Roots, and Reciprocals
61
11
Probability
68
12
Statistics
75
13
Trigonometry
8
1
How to Use the TI-30X Ú
S
(continued)(continued)
14
Notation
88
15
Logarithms and Antilogarithms
91
16
Angle Settings and Conversions
94
17
Polar and Rectangular Conversions
98
18
Hyperbolics
100
Appendix A
A-1
Quick Reference to Keys
Appendix B
B-1
Display Indicators
Appendix C
C-1
Error Messages
Appendix D
D-1
Support and Service Information
Appendix E
E-1
Warranty Information
© 1999 T
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TI-30X ÙS: A Guide for Teachers
1
The Better Batter —
The FIX Key 2
Star Voyage —
Scientific Notation 6
Trig Functions 10
What’s My Score? —
1-Variable Statistics 14
Heart Rates —
1-Variable Statistics 17
WNBA Stats —
2-Variable Statistics 23
Activities
© 1999 T
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TI-30X ÙS: A Guide for Teachers
2
The Better Batter — The FIX Key
Overview
Students use
%
on the TI-30X
Ù
S to change
numbers to different place values. Students
calculate batting averages using the TI-30X
Ù
S and
then round their answers to three decimal places.
Math Concepts
rounding
place value
division
comparing and
ordering decimals
Materials
TI-30X ÙS
pencil
student
activity
Introduction
1. Have students practice rounding the following
numbers to 3 decimal places using pencil and
paper.
a. 2.35647 2.356
b. 15.3633 15.363
c. 0.02698 0.027
2. Have students round the following numbers to 4
decimal places using the TI-30X
Ù
S.
a. 4.39865 4.3987
b. 72.965912 72.9659
c. 0.29516 0.2952
d. 0.00395 0.0040
Activity
Present the following problem to students:
You are going to play Virtual Baseball. You need to
select 9 players from the list to be on your team.
Choose the players with the best batting averages.
Find the batting averages (number of hits
¾
number
of times at bat) rounded to 3 decimal places for each
player. Make a list of your players in order, from
highest to lowest.
See the table on the next page for solutions.
³ 1. Enter the first number.
4.39865
2. Press % to display
the menu that lets you set
the number of decimal
places.
F0123456789
3. Press
4
to select 4
decimal places.
4.39865
4. Press <.
4.39865
4.3987
© 1999 T
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TI-30X ÙS: A Guide for Teachers
3
The Better Batter — The FIX Key
(Continued)
Player Number of
Hits
Number of
Times at Bat
Batting
Average
C. Ripken 122 368 0.332
Puckett 119 363 0.328
Molitor 119 364 0.327
Greenwell 104 334 0.311
Tartabull 103 311 0.331
Palmeiro 120 366 0.328
Franco 109 344 0.317
Joyner 105 338 0.311
Boggs 106 329 0.322
Baines 91 290 0.314
Sax 113 388 0.291
Williams 20 74 0.270
Sheridan 15 63 0.238
Barfield 64 284 0.225
Mattingly 109 367 0.297
Hall 87 280 0.311
© 1999 T
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TI-30X ÙS: A Guide for Teachers
4
The Better Batter —
The FIX Key
Name ___________________________
Date ___________________________
Problems
1. Round the following numbers to 3 decimal places.
a. 2.35647 _________________
b. 15.3633 _________________
c. 0.02698 _________________
2. Using the TI-30X
Ù
S, round the following numbers to 4 decimal places.
a. 4.39865 _________________
b. 72.965912 _________________
c. 0.29516 _________________
d. 0.00395 _________________
© 1999 T
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TI-30X ÙS: A Guide for Teachers
5
The Better Batter —
The FIX Key
Name ___________________________
Date ___________________________
Problem
You are going to play Virtual Baseball. You need to select 9 players from the list to
be on your team. Choose the players with the best batting averages.
Procedure
1. Find the batting averages (number of hits
¾
number of times at bat) rounded to
3 decimal places for each player.
Player Number of Hits Number of
Times at Bat
Batting Average
(rounded to 3 decimal places)
C. Ripken 122 368
Puckett 119 363
Molitor 119 364
Greenwell 104 334
Tartabull 103 311
Palmeiro 120 366
Franco 109 344
Joyner 105 338
Boggs 106 329
Baines 91 290
Sax 113 388
Williams 20 74
Sheridan 15 63
Barfield 64 284
Mattingly 109 367
Hall 87 280
2. Make a list of your players in order, from highest to lowest.
Player 1 ____________________ Player 6 ____________________
Player 2 ____________________ Player 7 ____________________
Player 3 ____________________ Player 8 ____________________
Player 4 ____________________ Player 9 ____________________
Player 5 ____________________
© 1999 T
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TI-30X ÙS: A Guide for Teachers
6
Star Voyage — Scientific Notation
Overview
Students investigate scientific notation by changing
numbers into scientific notation, and then using
them in calculations.
Math Concepts
• scientific
notation
• addition
• division
Materials
• TI-30X ÙS
• pencil
student activity
Introduction
Set up the activity by telling your students:
The standard form for scientific notation is a Q 10
n
,
where a is greater than or equal to 1 and less than
10, and n is an integer.
1. Have students practice writing the following
numbers in scientific notation using pencil and
paper.
a. 93 000 000 9.3 Q 10
7
b. 384 000 000 000 3.84 Q 10
11
c. 0.00000000000234 2.34 Q 10
-12
d. 0.0000000157 1.57 Q 10
-8
2. Have students change the following numbers into
scientific notation using the TI-30X
Ö
S.
a. 12 000 000 1.2 Q 10
7
b. 974 000 000 9.74 Q 10
8
c. 0.0000034 3.4 Q 10
-6
d. 0.000000004 4 Q 10
-9
Note: Answers assume the default floating decimal
setting.
1. Enter the first number.
12000000
2. Press % d.
FLO SCI ENG
3. Press " < <.
12000000
1.2
x10
07
4. Now, just type the next
number and press <.
3. Have students change the following numbers into
floating decimal (standard notation).
a. 5.8
Q
10
7
58 000 000
b. 7.32
Q
10
5
732 000
c. 6.2
Q
10
-6
0.0000062
d. 3
Q
10
-8
0.00000003
Note: To enter a negative number, press M and then
enter the number.
³ 1. Enter 5.8; press % C.
5.8
¯
2. Enter 7; press % d.
FLO SCI ENG
3. Press !
.
FLO
SCI ENG
4. Press < <.
5.8
¯
7
58000000.
5. Type the next number and
press <.
© 1999 T
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TI-30X ÙS: A Guide for Teachers
7
Star Voyage — Scientific Notation
(Continued)
Activity
Present the following problem to students:
You are a captain of a starship. You have been
assigned to go to Alpha Centauri and you have 5
years to get there. The distance from the sun to
Alpha Centauri is 2.5 x 10
13
miles. The distance
from the earth to the sun is approximately 9.3 x
10
7
miles. Your ship can travel at the speed of light.
You know that light can travel a distance of 6 x
10
12
miles in 1 light year. Will you be able to get to
Alpha Centauri on time?
Procedure
1. Using the TI-30X
Ö
S, find the total distance you
need to travel.
2.5 Q 10
13
+ 9.3 Q 10
7
= 2.5000093 Q 10
13
miles
2. Next, find out how long it will take you to travel
the distance. (distance traveled P 1 light year)
2.5000093 Q 10
13
P 6 Q 10
12
= 4.166682167 years
3. Can you make the trip in the given time?
Yes
Hint: Make sure your calculator
is in scientific notation mode
before you beginning addition.
Extension
Now that you have been successful, you have been
asked to make another trip. The distance from the
Sun to Delta Centauri is 9 x 10
13
miles. How long
will it take you to get there from Earth?
15 years
Hint: The Earth is approximately
9.3 x 10
7
miles from the Sun.
© 1999 T
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TI-30X ÙS: A Guide for Teachers
8
Star Voyage —
Scientific Notation
Name ___________________________
Date ___________________________
Problems
1. Write the following numbers in scientific notation.
Standard Notation Scientific Notation
a. 93 000 000 _________________________
b. 384 000 000 000 _________________________
c. 0.00000000000234 _________________________
d. 0.0000000157 _________________________
2. Using the TI-30X
Ö
S, change the following numbers into scientific notation.
Standard Notation Scientific Notation
a. 12 000 000 000 000 _________________________
b. 974 000 000 000 _________________________
c. 0.0000000000034 _________________________
d. 0.0000000004 _________________________
3. Using the TI-30X
Ö
S, change the following numbers into floating decimal
notation (standard).
Scientific Notation Standard Notation
a. 5.8 Q 10
7
_________________________
b. 7.32 Q 10
5
_________________________
c. 6.2 Q 10
-6
_________________________
d. 3 Q 10
-8
_________________________
© 1999 T
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TI-30X ÙS: A Guide for Teachers
9
Star Voyage —
Scientific Notation
Name ___________________________
Date ___________________________
Problem
You are a captain of a starship. You have been assigned to go to Alpha
Centauri and you have 5 years to get there. The distance from the Sun to Alpha
Centauri is 2.5 x 10
13
miles. The distance from the Earth to the Sun is
approximately 9.3 x 10
7
miles. Your ship can travel at the speed of light. You
know that light can travel a distance of 6 x 10
12
miles in 1 light year. Will you
be able to get to Alpha Centauri on time?
Procedure
1. Using the TI-30X
Ö
S, find the total distance that you need to travel. ______
_________________________________________________________________
Hint: Make sure your calculator is in scientific notation mode before you begin addition.
2. Next, find out how long it will take you to travel the distance. (distance
traveled P 1 light year) ________________________________________________________
_______________________________________________________________________________
3. Can you make the trip in the given time? _____________________________
Extension
Now that you have been successful, you have been asked to make another
trip. The distance from the Sun to Delta Centauri is 9 x 10
13
miles. How long
will it take you to get there from Earth?
Hint: The Earth is approximately 9.3 Q 10
7
miles from the Sun.
© 1999 T
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TI-30X ÙS: A Guide for Teachers
10
Trig Functions
Overview
Students practice solving sine, cosine, and tangent
ratios, and solve problems involving trigonometric
ratios.
Math Concepts
• multiplication
• division
• trigonometric
ratios
Materials
• TI-30X ÙS
• pencil
student activity
Introduction
Introduce the trigonometric ratios to students.
sin = opposite leg
¾
hypotenuse
cos = adjacent leg
¾
hypotenuse
tan = opposite leg
¾
adjacent leg
1. Have students find the trigonometric ratios for
the triangle using the above definitions. Round to
the nearest hundredth if necessary. (Use
%
for rounding.)
a. sin C 3
¾
5 = 0.60
b. cos C4
¾
5 = 0.80
c. tan C3
¾
4 = 0.75
d. sin A4
¾
5 = 0.80
e. cos A3
¾
5 = 0.60
f. tan A4
¾
3 = 1.33
³ To set 2 decimal places:
1. Press % .
F0123456789
2. Press
2
to select 2
decimal places.
2. Have students find the value of each ratio using
the TI-30X
Ù
S. Round to the nearest 10
thousandth.
a. sin 71° 0.9455
b. tan 31° 0.6009
c. cos 25° 0.9063
³ To find sin 71°:
1. Press >.
sin(
2. Enter
71
; press E <.
sin(71)
0.945518576
3. Press %
4
.
sin(71)
0.9455
3. Have students find the measure of each angle
using the TI-30X
Ù
S. Round to the nearest degree.
a. sin B = 0.4567 27 degrees
b. cos A = 0.6758 47 degrees
c. tan C = 5.83 80 degrees
³ To find
B
when sin
B
=0.4567:
1. Press % Z.
sin
-1
(
2. Enter
.4567
; press E <.
sin
-1
(.4567)
27.1744
3. Press %
0
.
sin
-1
(.4567)
27.
5
4
3
BC
A
© 1999 T
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TI-30X ÙS: A Guide for Teachers
11
Trig Functions
(Continued)
Activity
Present the following problem to students:
You need to build a ramp to your front door. The
distance from the ground to the bottom of the door
is 1.5 feet. You dont want the angle of incline to be
more than 6 degrees. The distance from the street to
the door is 20 feet. Is there enough room to build the
ramp?
Procedure
1. Make a drawing of the problem.
1.5 ft.
A
20 ft.
2. Use the trigonometric ratio
tan = opposite leg
¾
adjacent leg
to find angle A.
Angle A is 4.3 degrees (rounded to the nearest
tenth). Yes, there is enough room to build the
ramp.
³ 1. Press % \.
tan
-1
(
2. Enter
1.5
W
20
and press
E <.
tan
-1
(1.5/20)
4.3
Extension
Present the following problem to students:
You want to start the ramp 15 feet away from the
door. Can you do that and still have the angle of
incline be less than 6 degrees?
Yes, angle A is 5.7º.
³ 1. Press % \.
tan
-1
(
2. Enter
1.5
¾¾
15
and press
<.
tan
-1
(1.5/15
5.7
© 1999 T
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TI-30X ÙS: A Guide for Teachers
12
Trig Functions
Name ___________________________
Date ___________________________
Problems
1. Find the trigonometric ratios for the triangle. Round to the nearest
hundredth. (Use
%
for rounding.)
a. sin C _______________________
b. cos C _______________________
c. tan C _______________________
d. sin A _______________________
e. cos A _______________________
f. tan A _______________________
2. Using the TI-30X
Ù
S, find the value of each ratio. Round to the nearest ten
thousandth.
a. sin 71º _______________________
b. tan 31º _______________________
c. cos 25º _______________________
3. Using the TI-30X
Ù
S, find the measure of each angle. Round to the nearest
degree.
a. sin B = 0.4567 _______________________
b. cos A =0.6758 _______________________
c. tan C = 5.83 _______________________
5
4
3
BC
A
© 1999 T
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TI-30X ÙS: A Guide for Teachers
13
Trig Functions
Name ___________________________
Date ___________________________
Problem
You need to build a ramp to your front door. The distance from the ground to
the bottom of the door is 1.5 feet. You dont want the angle of incline to be
more than 6 degrees. The distance from the street to the door is 20 feet. Is
there enough room to build the ramp?
Procedure
1. Make a drawing of the problem.
2. Use the trig ratio tan = opposite leg
¾
adjacent leg to find angle A. (Round
your answer to the nearest tenth.) ___________________________________
_________________________________________________________________
3. Is there room to build the ramp? ____________________________________
Extension
You want to start the ramp 15 feet away from the door. Can you do that and
still have the angle of incline be less than 6 degrees?
© 1999 T
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TI-30X ÙS: A Guide for Teachers
14
What’s My Score? — 1-Variable Statistics
Overview
Students use the given test scores to find averages.
Math Concepts
• averages
Materials
• TI-30X ÙS
• pencil
student activity
Introduction
Discuss finding averages with your students.
Activity
Present the following problem to students:
You and your friend are having a contest. The one
gets the highest average on their math tests for one
quarter wins. Your scores are 98, 89, 78, 98, and
100. Your friends scores are 89, 89, 97, 90, and
100. Who is the winner?
Procedure
1. Have students find the average of their scores
using the TI-30X
Ù
S. Remember to enter 2 as the
frequency for 98 and 1 for all others.
³ 1. Press % t < to
select
1-VAR
mode.
2. Press v and enter your
first score.
X1 = 98
3. Press $ and enter
2
as
the frequency for 98.
FRQ = 2
4. Press $. Continue
entering your scores and
frequencies, pressing $
after each score and
frequency.
5. When finished, press
u " to select v, the
average. Write it down.
n
v
Sx
s
x ¹
92.6
© 1999 T
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TI-30X ÙS: A Guide for Teachers
15
What’s My Score? — 1-Variable Statistics
(Cont.)
2. Now find the average of your friends scores.
Remember to put 2 as the frequency for 89 and 1
for all others.
3. Who won?
Your friend: 93 (You had 92.6.)
³ 1. Press % t " " to
select
CLRDATA
. Press
<.
2. Press v and enter the
friend’s first score.
X1 = 89
3. Continue entering the
friend’s scores and
frequencies, following
steps 3 and 4 on the
previous page.
4. When finished, press
u " to select
v
, the
average. Write it down.
n
v
Sx
sx ¹
93.0
Extension
Present the following problem to students:
Your friend took a test on the day you were absent
and scored 95. What score do you need to get so that
you are the winner?
The score you need: 98
Note:
Make sure you exit the
STAT
mode before going on
to another problem.
³ 1. Press % t and " "
to
CLRDATA
. Press <.
2. Recalculate your friend’s
average, making sure to
include the new score.
3. Use guess and check to
figure out what score you
need to get.
4. To exit
STAT
mode, press
% w <.
© 1999 T
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TI-30X ÙS: A Guide for Teachers
16
What’s My Score? —
1-Variable Statistics
Name ___________________________
Date ___________________________
Problems
1. You and your friend are having a contest. Whoever gets the highest average on
their math tests for one quarter wins. Your scores are 98, 89, 78, 98, and 100.
Your friend's scores are 89, 89, 97, 90, and 100. Who is the winner?
Your average _______________________
Your friends average _______________________
2. Your friend took a test on the day you were absent and scored 95. What score
do you need to get so that you are the winner?
Your friends new average _______________________
Your new score _______________________
© 1999 T
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TI-30X ÙS: A Guide for Teachers
17
Heart Rates — 1-Variable Statistics
Overview
Students use the statistics functions of the
TI-30X
Ù
S calculator to investigate the effect of
exercise on heart rate.
Math Concepts
• mean,
minimum,
maximum, and
range
Materials
• TI-30X ÙS
• stopwatch or
a watch with
a second hand
student activity
Introduction
Students may be placed in smaller groups for this
activity to minimize the amount of data to be
entered. Ask students:
What do you think the average heart rate is for
someone your age?
What about after exercising?
Activity
Have students complete the following investigation
to check their estimations.
1. Have students check their resting heart rates by
timing their pulse for 1 minute. (You could have
them time for 10 seconds and then multiply by 6,
but this could be the quietest minute of your day!)
2. Collect data on the chart. Enter each students
heart rate and a mark in the frequency column.
As other students have the same heart rate, add
another tally mark in the frequency column.
3. Enter the heart rate data into the TI-30X
Ù
S.
a. Enter the first heart rate on the chart as the
first
X
value, and the number of tallies for
that heart rate as the frequency.
b. You must press
$
between entries. For
example, enter the first heart rate, and then
press
$
. Enter the first frequency, and then
press
$
.
For example, assume a class of 22 students:
Rate Students Rate Students
60 3 63 3
61 5 64 1
62 6 65 4
³ 1. Press % t <.
2. Press v to enter the
heart rates and
frequencies.
X1=
3. Enter first heart rate and
press $.
FRQ=
4. Continue entering until
you have entered all the
heart rates and
frequencies.
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Heart Rates — 1-Variable Statistics
(Continued)
4. Check the statistics calculations. After
students display
Òx
(Sigma x), explain that
Òx
is the sum of all the heart rates. Ask students:
How many heartbeats were there in one
minute?
Is the average heart rate higher or lower
than you expected?
5. Now we will see the effect of some exercise
on heart rate. Tell students:
If at any point during this portion of the
activity you experience pain, weakness, or
shortness of breath, stop immediately.
6. Have the students run in place for 2 minutes
and then give them these instructions:
a. Time your pulse for 1 minute.
b. Record your heart rate as before.
c. Enter the data into the calculator.
d. Compare the average heart rate after
running with the resting heart rate.
1. Press u.
n
Ï
Sx
Î
x
22.
n should equal the total
number of student sampled.
2. Press " to
Ï
to see the
average heart rate.
n
Ï
Sx
Î
x
62.
3. Press " " " to
Ò
x
.
Ò
x
Ò
x
2
1370.
Note: The numbers show the
results of the example described
above. Your students’ results will
vary depending on the size of
group and the heart rate readings.
7. Now have the students do jumping jacks for 2
minutes. Instruct them to time their pulse for 1
minute again and record as before. Have them
enter the data into the calculator again and
calculate the average heart rate after jumping
jacks. Compare to the other 2 averages.
8 How fit is the class? If the class (or individual)
heart rate after jumping jacks is less than 90,
then you are in great shape. If it is higher than
125, then you are in poor shape.
9.
Instruct students to make a histogram of the 3
sets of data they collected. Ask students:
How are the histograms the same?
How are they different?
Is the data grouped the same or is it more
spread out in one graph compared to
another?
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19
Heart Rates —
1-Variable Statistics
Name ___________________________
Date ___________________________
Problem
What do you think the average heart rate is for someone your age? What about
after exercising?
Procedure
1. Use this table to record your class or group data (resting).
Heartbeats per minute
(resting)
Frequency
2. What is the class (group) average? ___________________________________
3. What is the total number of heartbeats for the minute? _________________
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Heart Rates —
1-Variable Statistics
Name ___________________________
Date ___________________________
4. Use this table to record your class or group data (running).
Heartbeats per minute
(running)
Frequency
5. What is the class (group) average?___________________________________
6. What is the total number of heartbeats for the minute? _________________
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Heart Rates —
1-Variable Statistics
Name ___________________________
Date ___________________________
7. Use this table to record your class or group data (jumping).
Heartbeats per minute
(jumping)
Frequency
8. What is the class (group) average? __________________________________
9. What is the total number of heartbeats for the minute? _________________
10. How fit is the class? _______________________________________________
_________________________________________________________________
Note: If the class (or individual) heart rate after jumping jacks is less than 90, then you are in
great shape. If it is higher than 125, then you are in poor shape.
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Heart Rates —
1-Variable Statistics
Name ___________________________
Date ___________________________
11. Now make a histogram for each of the 3 sets of data you collected.
Resting Running Jumping
12. How are the histograms the same? How are they different? _____________
_________________________________________________________________
_________________________________________________________________
13. Is the data grouped the same or is it more spread out in one graph
compared to another? _____________________________________________
_________________________________________________________________
_________________________________________________________________
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TI-30X ÙS: A Guide for Teachers
23
WNBA Stats — 2-Variable Statistics
Overview
Students use WNBA statistics to explore the
relationship between 2 variables. They use the
TI-30X
Ù
S to compute the regression equation and
evaluate some values.
Math Concepts
• 2-variable
statistics
Materials
• TI-30X ÙS
• pencils
student activity
Activity
Present the following problem to students:
Do you think WNBA (Womens National Basketball
Association) playing time (in minutes per game)
is related to how many points a player scores? Do
you think it is related to how many rebounds a
player gets? Or is it related to the players field-goal
percentage?
Procedure
1. Put the calculator in
STAT
mode and choose
2-VAR
statistics.
1. Press % t and then
".
1-VAR 2-VAR
2. Press < to select
2
-
VAR
.
2. Using the table in the activity, enter the data.
Enter points per game as the
X
-variable and
minutes per game (playing time) as the
Y
-variable.
1. Press v.
X1=
2. Enter
10.1
(points per
game for the first player,
Rhonda Mapp).
X1=10.1
3. Press $.
Y1=1
4. Enter
21.7
(minutes per
game for Rhonda Mapp).
Y1=21.7
5. Press $ to enter data for
the second player.
6. Enter data for each player
in the table. Press $ after
entering each data point.
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WNBA Stats — 2-Variable Statistics
(
Continued)
3. Calculate the statistical data.
You may want to fix the decimal to 2 places
before doing the statistical calculations.
1. Press % .
F0123456789
2. Press
2
.
Ask students:
What is the average points scored for the
players shown?
What is the average playing time?
What is the total number of points scored
per game for all the given players?
You may want to discuss the other statistical
variables and what they mean.
1. Press u.
n Ï Sx Îx Ð
12.00
2. Press " to
Ï
.
n Ï Sx Îx Ð
9.33
3. Press " " " to
Ð
.
n Ï Sx Îx Ð
21.59
4. Press " " " to Ò
x
.
Sy Îy Òx
112.00
4. The form of the equation is
y = ax + b
. Write
the equation for the line of best fit (round to
the nearest hundredth).
1.56x + 7.02
5. The closer the correlation coefficient value is
to 1 (or 1), the better the correlation
between the two variables. Write the
correlation coefficient.
r
= .91
1. Press " until you get to
a
.
This is the slope of the line of
best fit.
ÒXY a
b r
1.56
2. Press " to
b
. This is the
y-intercept of the line.
Ò XY a b
r
7.02
3. Press " to
r
. This is the
correlation coefficient.
ÒXY a b r
0.91
6. Now calculate how many minutes you would
expect a player to play if she averages 15
points per game.
1. Press " " to
y¢
.
x
¢
y
¢
2. Press <.
3. Type
15
E and press <.
y¢(15)
30.44
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TI-30X ÙS: A Guide for Teachers
25
WNBA Stats — 2-Variable
Statistics
(
Continued)
7. Now calculate how many points you would
expect a player to score if she plays 35 minutes a
game.
8. Discuss the correlation as a class. Ask students:
Are there other factors affecting the players
minutes per game besides points scored?
What about defense, rebounding, etc.?
1. Press u.
n Ï Sx Îx Ð
12.00
2. Press ! ! to
x¢
.
x
¢
y
¢
3. Press <.
4. Type
35
E and press
<.
x
¢
(35)
17.92
Extension
Now have students use the calculator to investigate
the correlation of the other data in the chart such as
the relation of field-goal percentage to minutes per
game, or rebounds per game to minutes per game.
(Remember, since you have already entered the
minutes in
Y
, you only need to enter the new data
in
X
.)
Ask students:
Which 2 variables have the closest correlations?
(That is, which have the correlation coefficient
closest to 1 or 1?)
© 1999 T
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TI-30X ÙS: A Guide for Teachers
26
WNBA Stats —
2-Variable Statistics
Name ___________________________
Date ___________________________
Problem
Do you think WNBA playing time (in minutes per game) is related to how
many points a player scores? Do you think it is related to how many rebounds
a player gets? Or is it related to the players field goal percentage?
Procedure
Use the following table of data to explore the relationships of different pairs of
data. Begin by entering the points per game as the
X
-variable and the minutes
per game as the
Y
-variable.
Player Field-Goal
Percentage
Points
per Game
Rebounds
per Game
Minutes
per Game
1. Rhonda Mapp .506 10.1 4.3 21.7
2. Vicky Bullet .441 13.3 6.5 31.6
3. Janeth Arcain .426 6.8 3.6 21.9
4. Cynthia Cooper .446 22.7 3.7 35
5. Elena Baranova .420 12.9 9.3 33.6
6. Malgozata Dydek .482 12.9 7.6 28
7. Heidi Burge .509 6.7 3.3 16.7
8. Keri Chaconas .297 4.8 .8 13.2
9. Rebecca Lobo .484 11.7 6.9 29.2
10. Coquese Washington .294 1.9 .9 8.1
11. Toni Foster .467 4.9 1.9 13.6
12. Maria Stepanova .426 3.3 1.9 6.5
© 1999 T
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TI-30X ÙS: A Guide for Teachers
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WNBA Stats —
2-Variable Statistics
Name ___________________________
Date ___________________________
Extension
Use the calculator to investigate the correlation of the other data in the table
such as the relation of field-goal percentage to minutes per game, or rebounds
per game to minutes per game. (Remember, since you have already entered
the minutes per game in
Y
, you only need to enter the new data in
X
.)
1. What is the average field-goal percentage?
2. Write the equation for the line of best fit.
3. Write the correlation coefficient.
4. What is the average number of rebounds per game?
5. Write the equation for the line of best fit.
6. What is the total number of rebounds per
game for all the given players?
7. Write the equation for the line of best fit.
8. Write the correlation coefficient.
9. Which 2 variables have the closest correlation?
(That is, which have the correlation coefficient
closest to 1 or 1?)
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TI-30X
Ú
S Basic Operations
29
Clear, Insert, and Delete
33
Basic Math
36
Order of Operations and Parentheses
40
Constant
43
Decimals and Decimal Places
45
Memory
47
Fractions
52
Pi
58
Powers, Roots, and Reciprocals
61
Probability
68
Statistics
75
Trigonometry
81
Notation
88
Logarithms and Antilogarithms
91
Angle Settings and Conversions
94
Polar and Rectangular Conversions
98
Hyperbolics
100
How to Use
the TI-30X
Ú
S
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TI-30X
Ú
S Basic Operations
1
Keys
1.
&
turns on the calculator.
2.
%
turns on the
2nd
indicator and
accesses the function shown above the
next key you press.
3.
%
'
turns off the calculator and
clears the display.
4.
<
completes the operation or executes
the command.
5.
%
i
recalls the most recently
calculated result and displays it as
Ans
.
6.
!
and
"
move the cursor left and right to
scroll the entry line. Press
%
!
or
%
"
to scroll to the beginning or end of
the entry line.
#
and
$
move the cursor up and down
through previous entries.
%
#
or
%
$
scroll to the beginning or end of history.
7.
%
displays the
RESET
menu.
RESET: N Y
Press
<
when
N
(no) is
underlined to return to the previous
screen without resetting the
calculator.
Press
<
when
Y
(yes) is
underlined to reset the calculator.
The message
MEM CLEARED
is
displayed.
Note
: Pressing
&
and
-
simultaneously
resets the calculator
immediately. No menu or message is
displayed.
Notes
The examples on the transparency masters
assume all default settings.
Resetting the calculator:
Returns settings to their defaults:
floating decimal (standard) notation
and degree (
DEG
) mode.
Clears memory variables, pending
operations, entries in history,
statistical data, constants, and
Ans
(Last Answer).
The entry line can contain up to 88
characters. When
¸
or
¹
appear in the
display, the entry line contains more
characters to the left or right. When
º
or
»
appear, more characters are located above
or below the entry line.
Press
&
after Automatic Power Down
é
(APD
é
). The display, pending operations,
settings, and memory are retained.
1
3
4
7
2
5
6
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30
Second, Off, Arrows,
Equals
%
¥
! "
# $ <
Enter 46 N 23. Change 46 to 41.
Change 23 to 26 and complete the
operation. Enter 81 + 57 and
complete the operation. Scroll to
see your previous entries.
Press Display
46 U 23
46-23
DEG
! ! ! ! 1
" " 6 <
41-26
'
15.
DEG
81 T 57 <
81+57
'
138.
DEG
%
¥
&
~
'
DEG
# # $
81+57
'
DEG
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Reset
%
¨
Reset the calculator.
Press Display
%
¨
RESET: N Y
-
DEG
"
RESET: N Y
-
DEG
<
MEM CLEARED
DEG
-
~
DEG
Pressing &
and - at the same
time also resets the calculator
immediately. No menu or message is
displayed.
Using %
¨
or & and -
returns all settings to their defaults
and clears the memory.
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Last Answer (Ans)
%
ª
Use Last Answer (Ans) to calculate
(2+2)
2
.
Press Display
2 T 2 <
2+2
4.
DEG
%
ª
F
<
Ans
2
'
16.
DEG
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Clear, Insert, and Delete
2
Keys
1.
-
clears characters and error
messages. Once the display is clear, it
moves the cursor to the most recent
entry.
2.
%
f
lets you insert a character at the
cursor.
3.
J
deletes the character at the cursor.
Hold
J
down to delete all characters to
the right. Then, each time you press
J
, it
deletes 1 character to the left of the
cursor.
Notes
The examples on the transparency masters
assume all default settings.
Pressing
-
does not affect the
memories, statistical registers, angle
units, or numeric notation.
1
2
3
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Delete, Insert
J %
Enter 4569 + 285, and then
change it to 459 + 2865. Complete
the problem.
Press Display
4569 T 285
4569+285
DEG
! ! ! ! !
! J
459+285
DEG
" " " "
%
6
459+2865
DEG
<
459+2865
'
3324.
DEG
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Clear
-
Enter 21595.
Clear the 95.
Clear the entry.
Press Display
21595
21595
DEG
! ! -
(Clear to right)
215
DEG
-
(Clear entry)
~
DEG
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Basic Math
3
Keys
1.
T
adds.
2.
U
subtracts.
3.
V
multiplies.
4.
W
divides.
5.
<
completes the operation or executes
the command.
6.
M
lets you enter a negative number.
7.
%
_
changes a real number to a percent.
Notes
The examples on the transparency masters
assume all default settings.
The TI-30X
Ù
S allows implied multiplication.
Example
: 3 (4+3) = 21
Do not confuse
M
with
U
.
U
allows
subtraction.
Results of percent calculations display
according to the decimal notation mode
setting.
1
2
3
4
5
6
7
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7
Add, Subtract, Multiply,
Divide, Equals
T U V W
<
Find: 2 + 54 ½ 6 =
16 x 21 =
78 P 2 =
12 x (5 + 6) =
Press Display
2 T 54 U 6
<
2+54-6
'
50.
DEG
16 V 21 <
16
*
21
'
336.
DEG
78 W 2 <
78/2
'
39.
DEG
12 V D 5 T
6 E <
12
*
(5+6)
'
132.
DEG
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38
Negative Numbers
M
The temperature in Utah was L3¡ C
at 6:00 a.m. By 10:00 a.m. the
temperature had risen 12¡ C. What
was the temperature at 10:00 a.m.?
Press Display
M 3 T 12
<
-
3+12
'
9.
DEG
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Percent
%
£
Mike makes $80 per week. He saves
15% of his earnings. How much does
Mike save per week?
Press Display
15
15
DEG
%
£
V 80
<
15%
*
80
'
12.
DEG
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TI-30X ÙS: A Guide for Teachers
40
Order of Operations and Parentheses
4
Keys
1.
D
opens a parenthetical expression.
2.
E
closes a parenthetical expression.
Notes
The examples on the transparency masters
assume all default settings.
The transparency master showing the
Equation Operating System (EOS
TM
)
demonstrates the order in which the
TI-30X
Ù
S completes calculations.
Operations inside parentheses are
performed first. Use
D
E
to change the
order of operations and, therefore, change
the result.
Example
: 1 + 2 x 3 = 7
(1 + 2) x 3 = 9
2
1
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Equation Operating System
EOS
1
(first)
Expressions inside D E.
2
Functions that need a E and precede the
expression, such as the >, A, or
%
menu items
.
3
Functions entered after the expression, such as
F and angle unit modifiers (¡, ¢, £, r, g).
4
Fractions.
5
Exponentiation (G) and roots (%
¡
)
.
6
Negation (M).
7
Permutations (nPr), and combinations (nCr).
8
Multiplication, implied multiplication, and division.
9
Addition and subtraction.
10
Conversions (%
š
,
%
, and
8DMS)
.
11
(last)
<
completes all operations and closes all
open parentheses
.
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Order of Operations
T V D E
1 + 2 x 3 =
Press Display
1 T 2 V 3
<
1+2*3
'
7.
DEG
(1 + 2) x 3 =
Press Display
D 1 T 2 E V
3 <
(1+2)*3
'
9.
DEG
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Constant
5
Keys
1.
%
l
turns on the constant mode and
lets you define a constant. A
K
displays
when the constant mode is on.
2.
<
places the contents of
K
at the end
of the expression in the display.
Notes
The examples on the transparency masters
assume all default settings.
All functions, except statistics, work in
constant mode.
To enter a constant:
1. Press
%
l
. If a constant is
already stored, press
-
to clear
it.
2. Enter your constant (any set of
operations, functions, and values).
3. Press
<
to turn on the constant
mode.
K
appears in the display.
4. Press
-
to clear the display.
5. Enter an initial value. If you do not
enter a value, 0 is assumed, and
Ans
will appear in the display.
6. Press
<
to place the contents of
K
at the end of the expression and
evaluate it.
7. Continue pressing
<
to repeat
the constant.
The result is stored in
Ans
, which is
displayed, and the constant is used
to evaluate the new expression.
1
2
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44
Constant
%
Three people babysit for $3.25 each
per hour. First person works 16
hours. Second person works 12
hours. Third person works 17 hours.
How much did each person earn?
Press Display
%
K =
DEG
V 3.25 <
K = *3.25
DEG K
-
DEG K
16 <
16*3.25
'
52.
DEG K
12 <
12*3.25
'
39.
DEG K
17 <
17*3.25
'
55.25
DEG K
%
(Constant mode
is off.)
~
DEG
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Decimals and Decimal Places
6
Keys
1.
8
enters a decimal point.
2.
%
displays the following menu that
lets you set the number of decimal places.
F 0 1 2 3 4 5 6 7 8 9
F
Sets floating decimal
(standard) notation.
0-9
Sets number of decimal places.
Notes
The examples on the transparency masters
assume all default settings.
%
8
removes the setting and
returns to standard notation
(floating
decimal).
The
FIX
setting affects all decimal results
and the mantissa of Scientific and
Engineering notation results.
The TI-30X
Ù
S automatically rounds the
result to the number of decimal places
selected. For example, when the decimal is
set to 2 places, 0.147 becomes 0.15 when
you press
<
. The TI-30X
Ù
S also rounds
or pads resulting values with trailing zeros
to fit the selected setting. For example,
when the decimal is set to 5 places, 0.147
becomes 0.14700 when you press
<
.
All results are displayed to the
FIX
setting
until you clear the setting by either
pressing
%
8
or selecting
F
(floating) on the decimal notation menu.
Resetting the calculator also clears the
FIX
setting.
After pressing
%
, you can select the
number of decimal places in 2 ways:
Press
!
or
"
to move to the
number of decimal places you want,
and then press
<
, or
Press the number key that
corresponds to the number of
decimal places you want.
FIX
affects only the results, not the entry.
1
2
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Decimal, FIX
8 %
©
Round 12.345 to the hundredths
place, to the tenths place, and then
cancel the FIX setting.
Press Display
12 8 345
12.345
DEG
%
©
F
0123456789
_
DEG
" " "
F
0123456789
_
DEG
<
12.345
FIX DEG
<
12.345
'
12.35
FIX DEG
%
©
1
12.345
'
12.3
FIX DEG
%
©
8
12.345
'
12.345
DEG
© 1999 T
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7
Memory
7
Keys
1.
L
displays the following menu of
variables.
A B C D E
Lets you select a variable
in which to store the
displayed value. The new
variable replaces any
previously stored value.
rand
Lets you set a seed value
for random integers.
2.
z
displays the following menu of
variables.
A B C D E
Lets you view the stored
value before pasting it in
variable form to the display.
3.
%
{
clears all variables.
4.
%
h
displays the following menu of
variables.
A B C D E
Lets you view the stored
value before pasting it to
the display.
Notes
The examples on the transparency masters
assume all default settings.
You can store a real number or an
expression that results in a real number to
a memory variable.
When you select a variable using
z
,
the variable name (
A
,
B
,
C
,
D
,
or
E
) is
displayed on the entry line.
When you select a variable using
%
h
,
the value of the stored variable is
displayed on the entry line.
Resetting the calculator clears all memory
variables.
For more about
rand
, see Chapter 11,
Probability.
1
2
3
4
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Store, Memory Variable,
Clear Variable
L z
%
¦
Test scores: 96, 76, 85.
Weekly scores: 92, 83, 97, and 86.
Find the average of test and weekly
scores. Find the final average.
Press Display
96 T 76 T
85 <
96+76+85
257.
DEG
W 3 <
Ans/3
'
85.66666667
DEG
L <
Ans
¹
A
'
85.66666667
DEG
92 T 83 T
97 T 86 <
92+83+97+86
'
358.
DEG
W 4 <
Ans/4
'
89.5
DEG
T z
< <
Ans+A
'
175.1666667
DEG
W 2 <
Ans/2
'
87.58333333
DEG
© 1999 T
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49
Store, Recall
L
%
§
Which would be the better buy: 3
cassette tapes for $7.98, or 4
cassette tapes for $9.48?
Press Display
7 8 98 W 3
<
7.98/3
2.66
DEG
L <
Ans
¹
A
'
2.66
DEG
9 848 W 4
<
9.48 / 4
'
2.37
DEG
L " <
Ans
¹
B
'
2.37
DEG
View the first price again.
%
§
A B C D E
'
_
2.66
DEG
View the second price again.
"
A B C D E
'
_
2.37
DEG
© 1999 T
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Store, Recall
L
%
§
Shop Purchases Qty Cost
A shirts 2 $13.98 ea.
B ties 3 $7.98 ea.
C belt 1 $6.98
suspenders 1 $9.98
How much did you spend at each
shop, and how much did you spend
altogether?
Press Display
2 V 13 8 98
<
2*13.98
27.96
DEG
L
A B C D E
¹
'
27.96
DEG
<
Ans
¹
A
'
27.96
DEG
3 V 7 8 98
<
3*7.98
'
23.94
DEG
Continued
© 1999 T
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Store, Recall
(Continued)
L
%
§
Press Display
L " <
Ans
¹
B
'
23.94
DEG
6 8 98 T
9 8 98 <
6.98+9.98
'
16.96
DEG
L " "
<
Ans
¹
C
'
16.96
DEG
%
§
< T
27.96+
'
DEG
%
§
"
< T
¸
.96+23.94+
¹
'
DEG
%
§
" "
< <
27.96+23.94
¹
'
68.86
DEG
© 1999 T
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52
Fractions
8
Keys
1.
N
lets you enter mixed numbers and
fractions.
2.
%
O
converts a simple fraction to
a mixed number or a mixed number to a
simple fraction.
3.
%
j
converts a fraction to its decimal
equivalent or changes a decimal to its
fractional equivalent, if possible.
Notes
The examples on the transparency masters
assume all default settings.
To enter a mixed number or a fraction,
press
N
between the whole number and
the numerator and between the numerator
and the denominator.
You can enter a fraction or mixed number
anywhere you can enter a decimal value.
You can use fractions and decimals
together in a calculation.
Fractional results and entries are
automatically reduced to their lowest
terms.
Fractional calculations can show fractional
or decimal results.
When possible, calculations involving
2 fractions or a fraction and any
integer will display fractional results.
Calculations involving a fraction and
a decimal will always display results
as decimals.
For a mixed number, the whole number can
be up to 3 digits, the numerator can be up
to 3 digits, and the denominator can be
any number through 1000.
For a simple fraction, the numerator can be
up to 6 digits and the denominator can be
any number through 1000.
1
2
3
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Fractions
N
At the party, you ate
5
/
6
of the
pepperoni pizza and
1
/
10
of the
sausage pizza. How much pizza did
you eat?
Press Display
5 N 6 T 1
N 10 <
5®6+1®10
'
14 / 15
DEG
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Mixed Numbers
N
A baby weighed 4
3
/
8
kilograms at
birth. In the next 6 months, she
gained 2
3
/
4
kilograms.
How much does she weigh?
Press Display
4 N 3 N
8 T 2 N 3
N 4 <
4®3®8+2®3®4
'
7 1/8
DEG
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Mixed Number to Fraction,
Fraction to Mixed Number
%
š
Sam is making his birthday cake.
The recipe calls for 3
1
/
2
cups of
flour. He has only a
1
/
2
-cup
measuring cup. To find out how
many times Sam must use his
measuring cup, change the mixed
number to a fraction.
3
1
/
2
¾
1
/
2
= 7
Press Display
3 N 1 N 2
3®1®2
DEG
%
š
3®1®2'
A
b
/
c
,
'
d
/
e
DEG
<
3®1®2'
A
b
/
c
,
'
d
/
e
'
7 / 2
DEG
Show the mixed number again.
%
š
<
Ans'
A
b
/
c
,
'
d
/
e
'
3 1/2
DEG
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Fraction to Decimal
%
Juan swims 20 laps in 5.72 minutes.
Mary swims 20 laps in 5
3
/
4
minutes. Change Mary’s time to a
decimal to determine who swims
faster.
Press Display
5 N 3 N
4 %
5®3®4.F
,
'
D
DEG
<
5®3®4.F
,
'
D
'
5.75
DEG
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7
Decimal to Fraction
%
Change 2.25 to its fractional
equivalent.
Press Display
2 8 25
%
<
2.25.F
,
'
D
21®4
DEG
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58
Pi
9
Keys
1.
g
displays the value of pi rounded to 10
digits (3.141592654).
Notes
The examples on the transparency masters
assume all default settings.
Internally, pi is stored to 13 digits
(3. 141592653590).
After pressing
%
, you can select the
number of decimal places in 2 ways:
Press
!
or
"
to move to the
number of decimal places you want,
and then press
<
, or
Press the number key that
corresponds to the number of
decimal places you want.
The transparency masters show both
ways.
1
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59
Circumference
g
Use this formula to find the amount
of border you need if you want to
put a circular border all the way
around the tree.
Press Display
2 V g V 1.5
<
2
*
p
*
1.5
'
9.424777961
DEG
C = 2
p
r = 2 x
p
x 1.5m
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Area
g
Use this formula to find how much
of a lawn would be covered by the
sprinkler. Round your answer to the
nearest whole number, and then
return to Floating Decimal mode.
Press Display
g V 4 F
<
p
*
4
2
50.26548246
DEG
%
©
"
F 0123456789123456789
_
DEG
<
p
*
4
2
'
50.
FIX DEG
%
©
8
p
*
4
2
'
50.26548246
DEG
A =
p
r
2
=
p
x 4
2
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Powers, Roots, and Reciprocals
10
Keys
1.
F
squares the value.
2.
%
b
calculates the square root.
3.
%
c
calculates the specified root (x) of
the value.
4.
a
calculates the reciprocal.
5.
G
raises a value to a specified power.
Notes
The examples on the transparency masters
assume all default settings.
To use
G
, enter the base, press
G
, and
then enter the exponent.
The base (or mantissa) and the exponent
may be either positive or negative. Refer to
Domain under Error Messages in Appendix
C for restrictions.
The result of calculations with
G
must be
within the range of the TI-30X
Ù
S.
A sign change takes precedence over
exponents.
Example
:
L
5
2
=
L
25
(
L
5)
2
= 25
1
2
3
4
5
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Squares
F G
Use this formula to find the size of
the tarp needed to cover the entire
baseball infield.
A = x
2
= 27.4
2
Press Display
27.4 F <
or
27.4
2
'
750.76
DEG
27.4 G 2
<
90
^2
'
750.76
DEG
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Square Roots
%
œ
Use this formula to find the length
of the side of a square clubhouse if
3m
2
of carpet would cover the floor.
Round your answer to 0 decimal
places.
L = x = 3
Press Display
%
œ
3
E
<
(3)
1.732050808
DEG
%
©
"
<
(3)
2.
DEG
o
f
carpet
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Cubes
G
Use this formula to find the volume
of a cube with sides 2.3 meters long.
Change your answer to a fraction.
V = L
3
= 2.3
3
Press Display
2 8 3 G 3
<
2.3^3
'
12.167
DEG
%
<
Ans.F
,
.
D
'
12167/1000
DEG
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Powers
G
Fold a piece of paper in half, in half
again, and so on until you cannot
physically fold it in half again. How
many sections would there be after
10 folds? After 15 folds?
Press Display
2 G 10 <
2^10
'
1024.
DEG
2 G 15 <
2^15
'
32768.
DEG
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Roots
%
¡
If the volume of a cube is 125 cm
3
,
what is the length of each side?
Press Display
3 %
¡
125
<
3
x
Ñ
125.
5.
DEG
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7
Reciprocals
a
The chart below shows the amount
of time spent building model ships.
Time Portion
Spent Completed
Ships Building Per Hour
Sailing 10 hrs. ?
Steam 5 hrs. ?
Luxury 5
1
/
3
hrs. ?
How much of each model was
completed per hour?
Press Display
Sailing ship:
10 a %
<
10
-1
.F
,
.
D
'
1 / 10
DEG
Steam ship:
5 a %
<
5
-1
.F
,
.
D
'
1 / 5
DEG
Luxury liner:
5 N 1 N 3
a <
5®1®3
-1
'
3 / 16
DEG
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Probability
11
Keys
1.
H
displays the following menu of
functions.
nPr
Calculates the number of
possible permutations.
nCr
Calculates the number of
possible combinations.
!
Calculates the factorial.
RAND
Generates a random 10-
digit real number between
0 and 1.
RANDI
Generates a random
integer between 2 numbers
that you specify.
Notes
The examples on the transparency masters
assume all default settings.
A
combination
is an arrangement of
objects in which the order is not important,
as in a hand of cards.
A
permutation
is an arrangement of
objects in which the order is important, as
in a race.
A
factorial
is the product of all the positive
integers from 1 to
n
, where
n
is a positive
whole number
69.
To control a sequence of random numbers,
you can store (
L
) an integer to
RAND
just as you would store values to memory
variables. The seed value changes randomly
when a random number is generated.
For
RANDI
, use a comma to separate the 2
numbers that you specify.
1
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Combination (nCr)
H
You have space for 2 books on your
bookshelf. You have 4 books to put
on the shelf. Use this formula to
find how many ways you could place
the 4 books in the 2 spaces.
4 nCr 2 = x

ABCD
AB and BA
count as only 1
combination.
AB AC AD
BA
BC BD
CA
CB CD
DA
DB DC
Press Display
4 H "
nPr nCr !
¹
---
DEG
2 <
4 nCr 2
'
6.
DEG
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Permutation (nPr)
H
Four different people are running in
a race. Use this formula to find how
many different ways they can place
1
st
and 2
nd
.
4 nPr 2 = x
ABC D
AB and BA
count as 2
permutations.
AB AC AD
BA BC BD
CA CB CD
DA DB DC
Press Display
4 H
nPr nCr !
¹
---
DEG
2 <
4 nPr 2
'
12.
DEG
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Factorial (!)
H
Using the digits 1, 3, 7, and 9 only
one time each, how many 4-digit
numbers can you form?
4! = x
1379
ABCD
ABCD
BACD
CABD
DABC
ABDC
BADC
CADB
DACB
ACBD
BCAD
CBAD
DBAC
ACDB
BCDA
CBDA
DBCA
ADBC
BDCA
CDAB
DCAB
ADCB
BDAC
CDBA
DCBA
Press Display
4 H " "
nPr nCr !
¹
-
DEG
< <
4!
'
24.
DEG
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Random (RAND)
H
Generate a sequence of random
numbers.
Press Display
H " " "
¸
RAND RANDI
-
___
DEG
< <
RAND
'
0.839588694
DEG
< <
RAND
'
0.482688185
DEG
Results will vary.
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Random (RAND)
H
Set 1 as the current seed and
generate a sequence of random
numbers.
Press Display
1 L !
¸
rand
----
1083958869.
DEG
< <
1
¹
rand
'
1.
DEG
H " " "
< <
RAND
'
0.000018633
DEG
<
RAND
'
0.745579721
DEG
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Random Integer (RAND
I
)
H
Generate a random integer from 2
through 10.
Press Display
H !
¸
RAND RANDI
---
__
DEG
< 2 %
¤
10 E
¸
ANDI( 2, 10)
'
DEG
<
RANDI( 2, 10)
¹
'
3.
DEG
Results will vary.
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75
Statistics
12
Keys
1.
%
t
displays a menu from which you
can select
1-VAR,
2-VAR
or
CLRDATA
.
1-VAR
Analyzes data from 1 set
of data with 1 measured
variable—
x
.
2-VAR
A
nalyzes paired data from
2 sets of data with 2
measured variables—
x
, the
independent variable, and
y
, the dependent variable.
CLRDATA
Clears data values without
exiting
STAT
mode.
2.
v
lets you enter data points (
x
for
1-VAR
stats;
x
and
y
for
2-VAR
stats).
3.
%
w
displays the following menu
that lets you clear data values and exit
STAT
mode.
EXIT ST: Y N
Press
<
when
Y
(yes) is
underlined to clear data values and
exit
STAT
mode.
Press
<
when
N
(no) is
underlined to return to the previous
screen without exiting
STAT
mode.
4.
u
displays the menu of variables
with their current values.
n
Number of
x
(or
x
,
y
) data
points.
v
or
w
Mean of all
x
or
y
values.
Sx
or
Sy
Sample standard deviation
of
x
or
y.
sx
or
sy
Population standard
deviation of
x
or
y
.
Gx
or
Gy
Sum of all
x
values or
y
values.
Gx
2
or
Gy
2
Sum of all
x
2
values or
y
2
values.
Gxy
Sum of (
x
Q
y)
for all
xy
pairs in 2 lists.
a
Linear regression slope.
b
Linear regression
y-intercept.
r
Correlation coefficient.
Notes
The examples on the transparency masters
assume all default settings.
To save the last data point or frequency
value entered, you must press
<
or
$
.
You can change data points once they are
entered.
3
2
1
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Entering 1-VAR Stat Data
%
v
Five students took a math test.
Using their scores, enter the data
points—85, 85, 97, 53, 77.
Press Display
%
1-VAR 2-VAR
¹
-----
-
DEG
< v
X
1
=
S
STAT DEG
85
X
1
=85
S
STAT DEG
$
FRQ=1
S
STAT DEG
2
FRQ=2
S
STAT DEG
$ 97
X
2
=97
S
STAT DEG
$ $ 53
X
3
=53
S
STAT DEG
$ $ 77 <
Continued
X
4
=77
S
77.
STAT DEG
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7
Viewing the Data
(Cont.)
u
Find the number of data points (n),
the mean (v), the sample standard
deviation (Sx), the population
standard deviation (sx), the sum of
the scores (
Gx
), and the sum of the
squares (
Gx
2
).
Press Display
u
n v Sx sx
¹
-
5.
STAT DEG
"
n v Sx sx
¹
-
79.4
STAT DEG
"
n v Sx sx
¹
---
16.39512123
STAT DEG
"
n v Sx sx
¹
---
14.66424222
STAT DEG
"
¸
Gx Gx
2
---
397.
STAT DEG
"
Continued
¸
G
x
G
x
22
---
32597.
STAT DEG
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Removing Data Points
(Cont.)
%
˜
Return to the first data point.
Display the lowest score, drop it,
and then find the new mean (v).
Clear all data by exiting
STAT
mode.
Press Display
v
X
1
=85
S
STAT DEG
$ $ $ $
X
3
=53
S
STAT DEG
$ 0 <
FRQ=0
S
0.
STAT DEG
u "
n
v
Sx
s
x
-
86.
STAT DEG
%
˜
EXIT ST: Y N
-
STAT DEG
<
~
DEG
© 1999
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TI-30X ÙS: A Guide For Teachers
79
Entering 2-VAR Stat Data
%
v
The table below shows the number of
pairs of athletic shoes sold by a
small shoe store. Enter this data
as the data points.
Month Total No.(x) Brand A (y)
April 58 (x1) 35 (y1)
May 47 (x2) 28 (y2)
Press Display
%
"
1-VAR 2-VAR
&
-----
DEG
< v
X
1
=
S
STAT DEG
58
X
1
=58
S
STAT DEG
$ 35
Y
1
=35
S
STAT DEG
$ 47
X
2
=47
S
STAT DEG
$ 28
Y
2
=28
S
STAT DEG
<
Continued
Y
2
=28
S
28.
STAT DEG
© 1999
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TI-30X ÙS: A Guide For Teachers
80
Viewing the Data
(Cont.)
u
%
˜
If the store sells 32 pairs of shoes
in June, predict the June sales of
Brand A. When finished, exit STAT
mode and clear all data points.
Press Display
u !
%
x y
-
t
DEG
< 32 E
<
y (32)
18.45454545
t
DEG
%
˜
EXIT ST: Y N
-
t
DEG
<
~
DEG
© 1999 T
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81
Trigonometry
13
Keys
1.
@
calculates the tangent.
2.
%
\
calculates the inverse tangent.
3.
?
calculates the cosine.
4.
%
[
calculates the inverse cosine.
5.
>
calculates the sine.
6.
%
Z
calculates the inverse sine.
Notes
The examples on the transparency masters
assume all default settings.
Before starting a trigonometric
calculation, be sure to select the
appropriate angle mode setting (
degree,
radian,
or
gradient
—See Chapter 16,
Angle Settings and Conversions). The
calculator interprets values according to
the current angle-unit mode setting.
E
ends a trig function.
1
2
3
4
5
6
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TI-30X ÙS: A Guide For Teachers
82
Tangent
@
Use this formula to find the
distance from the lighthouse to the
boat. Round your answer to the
nearest whole number, and then
return to floating decimal mode.
Press Display
78 W @
27 E <
78/tan (27)
'
153.0836194
DEG
%
©
"
F 0 1 2 3 4 5 6 7 8 9
-
DEG
<
78/tan (27)
'
153.
FIX DEG
%
©
8
78/tan (27)
'
153.0836194
DEG
D = 78/TAN 27
© 1999 T
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TI-30X ÙS: A Guide For Teachers
83
Inverse Tangent
%
Ÿ
Use this formula to find the angle of
depression. Round your answer to
the nearest tenth, and then return
to floating decimal mode.
TAN x = 600/2500
Press Display
%
Ÿ
600 W
2500 E <
tan
-1
(600/25
¹
13.49573328
DEG
%
©
" "
F 0 1 2 3 4 5 6 7 8 9
-
DEG
<
tan
-1
(600/25
¹
'
13.5
FIX DEG
%
©
8
tan
-1
(600/25
¹
'
13.49573328
DEG
© 1999
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84
Cosine
?
Use this formula to find how far the
base of the ladder is from the
house. Round your answer to the
nearest whole number, and then
return to floating decimal mode.
D = 5 x COS 75
Press Display
5 V ?
75 E <
5*cos (75)
'
1.294095226
DEG
%
©
"
F 0 1 2 3 4 5 6 7 8 9
-
FIX DEG
<
5*cos (75)
'
1.
FIX DEG
%
©
8
5*cos (75)
'
1.294095226
DEG
© 1999 T
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TI-30X ÙS: A Guide For Teachers
85
Inverse Cosine
%
Use this formula to find the angle of
the ski jump. Round your answer to
the nearest tenth, and then return
to floating decimal mode.
COS x = 453/500
Press Display
%
453 W
500 E <
cos
-1
(453/50
¹
25.04169519
DEG
%
©
" "
F 0 1 2 3 4 5 6 7 8 9
-
DEG
<
cos
-1
(453/50
¹
'
25.0
FIX DEG
%
©
8
cos
-1
(453/50
¹
'
25.04169519
DEG
© 1999
T
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TI-30X ÙS: A Guide For Teachers
86
Sine
>
Use this formula to find the length
of the ramp. Round your answer to
the nearest whole number, and then
return to floating decimal mode.
D = 1.5/SIN 12
Press Display
1 8 5 W >
12 E <
1.5/sin (12)
¹
'
7.214601517
DEG
%
©
"
F 0 1 2 3 4 5 6 7 8 9
-
DEG
<
1.5/sin (12)
¹
'
7.
FIX DEG
%
©
8
1.5/sin (12)
¹
'
7.214601517
DEG
© 1999 T
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TI-30X ÙS: A Guide For Teachers
8
7
Inverse Sine
%
Use this formula to find the angle of
the conveyor belt. Round your
answer to the nearest tenth, and
then return to floating decimal
mode.
SIN x = 13/20
Press Display
%
13 W
20 E <
sin
-1
(13/20)
¹
'
40.54160187
DEG
%
©
" "
F 0 1 2 3 4 5 6 7 8 9
-
DEG
<
sin
-1
(13/20)
¹
'
40.5
FIX DEG
%
©
8
sin
-1
(13/20)
¹
'
40.54160187
DEG
© 1999
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TI-30X ÙS: A Guide For Teachers
88
Notation
14
Keys
1.
%
d
displays the following numeric
notation mode menu.
FLO
Restores standard mode
(floating decimal).
SCI
Turns on scientific mode
and displays results as a
number from 1 to 10 (1
n
< 10) times 10 to an
integer power.
ENG
Turns on engineering mode
and displays results as a
number from 1 to 1000 (1
n < 1000) times 10 to an
integer power. The integer
power is always a multiple
of 3.
2.
%
C
lets you enter and calculate the
exponent.
Notes
The examples on the transparency masters
assume all default settings.
You can enter a value in scientific notation
regardless of the numeric notation mode
setting. For a negative exponent, press
M
before entering it.
Results requiring more than 10 digits are
automatically displayed in scientific
notation.
For the Decimal notation mode, refer to
%
in Chapter 6, Decimals and
Decimal Places.
These modes (
FLO
,
SCI
, and
ENG
) affect
only
the display of results.
1
2
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TI-30X ÙS: A Guide For Teachers
89
Engineering, Scientific,
Floating Decimal
%
Enter 12543, which will be in floating
decimal notation (default), and
alternate between scientific and
engineering notations.
Press Display
12543
%
"
FLO SCI ENG
---
DEG
< <
12543
'
1.2543
x10
04
SCI DEG
%
"
FLO SCI ENG
---
SCI DEG
<
12543
'
12.543
x10
03
ENG DEG
%
"
FLO SCI ENG
---
ENG DEG
<
12543
'
12543.
DEG
© 1999
T
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TI-30X ÙS: A Guide For Teachers
90
Exponent
%
¢
The Earth is 1.496 x 10
8
kilometers
from the Sun. Jupiter is 7.783 x 10
8
kilometers from the Sun. Enter the
numbers in Scientific notation and
determine how far away the Earth is
from Jupiter.
Press Display
7 8 783
%
¢
8
7.783
E
8-1.4
¹
'
628700000.
DEG
U 1 8 496
%
¢
8
<
© 1999
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TI-30X ÙS: A Guide For Teachers
91
Logarithms and Antilogarithms
15
Keys
1.
A
calculates the common logarithm
(base 10).
2.
B
calculates the natural logarithm (base
e
, where
e
= 2.718281828459).
3.
%
]
calculates the common
antilogarithm (10 raised to the power of
the value).
4.
%
^
calculates the natural
antilogarithm (e raised to the power of the
value).
Note
The examples on the transparency masters
assume all default settings.
E
ends a logarithmic function.
1
4
3
2
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92
Common Logarithm,
Natural Logarithm
A B
Find log 23 rounded to 4 decimal
places. Then find ln 23 rounded to 4
decimal places and return to
Floating Decimal notation.
Press Display
A 23 E
<
log (23)
'
1.361727836
DEG
%
©
F 0 1 2 3 4 5 6 7 8 9
-
DEG
4
log (23)
'
1.3617
FIX DEG
B 23 E
<
ln (23)
'
3.1355
FIX DEG
%
©
8
ln (23)
'
3.135494216
DEG
© 1999
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TI-30X ÙS: A Guide For Teachers
93
Common Antilogarithm,
Natural Antilogarithm
%
%
Find antilog 3.9824 rounded to 4
decimal places. Then find antiln
3.9824 rounded to 4 decimal
places. When finished, return to
Floating Decimal notation.
Press Display
%
3 8
9824 E <
10^ (3.9824)
'
9602.846792
DEG
%
©
F 0 1 2 3 4 5 6 7 8 9
-
DEG
4
10^ (3.9824)
'
9602.8468
FIX DEG
%
3 8
9824 E <
e^ (3.9824)
'
53.6456
FIX DEG
%
©
8
e^ (3.9824)
'
53.64562936
DEG
© 1999
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TI-30X ÙS: A Guide For Teachers
94
Angle Settings and Conversions
16
Keys
1.
I
displays the following menu that lets
you change the
angle
mode setting to
DEG
,
RAD
, and
GRD
without affecting the value
in the display.
DEG
Sets degree mode.
RAD
Sets radian mode.
GRD
Sets gradient mode.
When you turn on the TI30X
Ö
S, it is
always in the
DEG
mode.
2.
=
displays a menu that lets you specify
the unit of an angle.
º
Specifies degrees.
r
Specifies radians.
g
Specifies gradients.
DMS
Specifies degrees (
º
), minutes
(
´
), and seconds (
´´
). It also lets
you convert an angle from
decimal degrees to
DMS
notation.
Notes
The examples on the transparency masters
assume all default settings.
Angles with a trig function ignore the angle
mode setting and display results in the
original unit. Otherwise, angles (without a
trig function) are converted and displayed
according to the angle mode setting.
You enter decimal-degree angles the same
as you would any other number.
For decimal/
DMS
conversions, the
calculator interprets all values as degrees,
regardless of the angle-unit setting.
DMS
angles are entered as
º
(degrees),
´
(minutes), and
´´
(seconds).
1
2
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95
Degrees, Minutes, and
Seconds to Decimal
=
You watched 2 videos that were 2:05
(2 hours and 5 minutes) and 1:46
(1 hour and 46 minutes) in length.
How long did you watch videos?
Press Display
2 =
¡
Å
Æ
r g
¹
-
DEG
<
2
¡
'
DEG
5 = "
¡
Å
Æ
r g
¹
-
DEG
< T 1 =
<
2
¡
5
Å
+ 1
¡
'
DEG
46
= "
< <
2
¡
5
Å
+ 1
¡
46
Å
'
3.85
DEG
= !
¸
'DMS
----
DEG
< <
Ans ' DMS
'
3
¡
51
Å
0
Æ
DEG
© 1999
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TI-30X ÙS: A Guide For Teachers
96
Fraction to Degrees,
Minutes, and Seconds
=
How much is
2
/
3
of an hour in hours,
minutes, and seconds?
Press Display
2 N 3
2
®
3
'
DEG
= !
%
'DMS
----
DEG
< <
2
®
3 ' DMS
'
0
¡
40
Å
0
Æ
DEG
© 1999
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TI-30X ÙS: A Guide For Teachers
9
Degrees, Radians,
Gradients
I
Calculate the sine of 30 in degrees,
radians, and gradients, and then
return to degrees.
Press Display
> 30 E
<
sin(30)
'
0.5
DEG
I "
DEG RAD GRD
---
DEG
< <
sin(30)
'
-0.988O31624
RAD
I "
DEG RAD GRD
---
RAD
< <
sin(30)
'
0.4539905
GRAD
I " <
<
sin(30)
'
0.5
DEG
© 1999
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98
Polar and Rectangular Conversions
17
Keys
1.
%
k
displays the following menu that
lets you convert rectangular coordinates
(
c
,
y
) to polar coordinates (
r
,
q
) or vice
versa.
R4Pr
Converts rectangular coordinate
to polar coordinate
r
.
R4P
q
Converts rectangular coordinate
to polar coordinate
q
.
P4R
c
Converts polar coordinate to
rectangular coordinate
c
.
P4Ry
Converts polar coordinate to
rectangular coordinate
y
.
2.
%
`
enters a comma.
Notes
The example on the transparency master
assumes all default settings.
Before starting calculations, set angle
mode as necessary.
1
2
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TI-30X ÙS: A Guide For Teachers
99
Polar to Rectangular
%
Convert the polar ordered pair
(7,30) to rectangular using the
DEG (¡) angle unit.
y
x
3
2
1
1234567
r = 7
30°
4
(x = ?, y = ?)
Press Display
%
" "
¸
P
'
Rx P
'
R
y
----
DEG
< 7 %
¤
30 E <
P
'
Rx(7,30)
'
6.062177826
DEG
%
!
¸
P
'
Rx P
'
R
y
----
DEG
< 7 %
¤
30 E <
P
'
Ry(7,30)
'
3.5
DEG
The rectangular ordered pair is
6.062177826,3.5.
© 1999
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100
Hyperbolics
18
Keys
1.
%
Y
accesses the hyperbolic (
sinh
,
cosh
,
tanh
) function of the next trig key
that you press.
Notes
The example on the transparency master
assumes all default settings.
Hyperbolic calculations are not affected by
the angle mode setting—whether or not
the calculator is in
RAD
(radian),
GRD
(gradient), or
DEG
(degree) modes.
1
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101
Sine, Cosine, Tangent
%
Find the hyperbolic sine (sinh),
cosine (cosh), and tangent (tanh)
of 5.
Press Display
%
> 5
E <
sinh(5)
'
74.20321058
DEG
%
? 5
E <
cosh(5)
'
74.20994852
DEG
%
@ 5
E <
tanh(5)
'
0.999909204
DEG
© 1999 T
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TI-30X ÙS: A Guide For Teachers
A-1
Quick Reference to Keys
A
Key Function
!
"
#
$
Moves the cursor left and right so you can scroll the entry line. Press
%
!
or
%
"
to scroll to the beginning or end of the entry line.
Moves the cursor up and down so you can see previous entries. Press
%
#
or
%
$
to scroll to the beginning or end of the history.
T
U
V
W
Adds, subtracts, multiplies, and divides.
7
6
Enters the digits 0 through 9.
D
E
Opens a parenthetical expression.
Closes a parenthetical expression.
a
Calculates the reciprocal.
F
Squares the value.
g
Enters the value of pi rounded to 10 digits (3.141592654).
8
Enters a decimal point.
M
Indicates the value is negative.
G
Raises a value to a specified power.
=
Displays the following menu that lets you specify the unit of an angle.
º
Specifies degrees.
r
Specifies radians.
g
Specifies gradients.
DMS
Specifies degrees (
º
), minutes (
´
), and seconds (
´´
). It
also lets you convert an angle from decimal degrees to
DMS
notation.
%
Turns on the
2nd
indicator and accesses the function shown above the
next key that you press.
%
]
Calculates the common antilogarithm (10 raised to the power of the value).
%
b
Calculates the square root.
%
_
Changes a
real number to percent. Results display according to the
Decimal Notation mode setting.
%
[,] Enters a comma.
%
c
Calculates the specified root (x) of the value.
© 1999 T
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TI-30X ÙS: A Guide For Teachers
A-2
Quick Reference to Keys
(Continued)
A
Key Function
N
Lets you enter mixed numbers and fractions.
%
O
Converts a simple fraction to a mixed number or a mixed number to a
simple fraction.
%
i
Recalls the most recently calculated result, displaying it as
Ans
.
-
Clears characters and error messages on the entry line. Once the display is
clear, it moves the cursor to the last entry in history.
%
{
Clears all memory variables.
?
Calculates the cosine.
%
[
Calculates the inverse cosine.
v
Lets you enter the statistical data points (
x
for
1-VAR
stats;
x
and
y
for
2-VAR
stats).
J
Deletes the character at the cursor. If you hold
J
down, it deletes all
characters to the right. Then each time you press
J
, it deletes 1
character to the left of the cursor.
I
Displays the following menu that lets you change the
Angle
mode to
degrees (
º
), radians (
r
), or gradients (
g
), and then back to degrees without
affecting the value in the display.
DEG
Sets degree mode.
RAD
Sets radian mode.
GRD
Sets gradient mode.
When you turn on the TI30X
Ù
S, it is always in the
DEG
mode.
%
^
Calculates the natural antilogarithm (e raised to the power of the value).
%
C
Lets you enter and calculate the exponent.
<
Completes the operation or executes the command.
%
w
Displays the following menu that lets you clear data values and exit
STAT
mode.
EXIT ST: Y N
Press
<
when
Y
(yes) is underlined to clear data values and exit
STAT
mode.
Press
<
when
N
(no) is underlined to return to the previous screen
without exiting
STAT
mode.
© 1999 T
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A-3
Quick Reference to Keys
(Continued)
A
Key Function
%
j
Converts a fraction to its decimal equivalent or converts a decimal to its
fractional equivalent, if possible.
%
Displays the following menu that lets you set the number of decimal places.
F 0 1 2 3 4 5 6 7 8 9
F
Sets floating decimal (standard) notation.
0-9
Sets number of decimal places.
%
Y
Accesses the hyperbolic (
sinh
,
cosh
,
tanh
) function of the next trig key
that you press.
%
f
Lets you insert a character at the cursor.
%
l
Turns on the constant mode and lets you define a constant.
B
Calculates the natural logarithm (base e, where e = 2.718281828459).
A
Calculates the common logarithm (base 10).
z
Displays the following menu of variables.
A B C D E
Lets you view the stored value before pasting it to the
display.
%
'
Turns off the calculator and clears the display.
&
Turns on the calculator.
H
Displays the following menu of functions.
nPr
Calculates the number of possible permutations.
nCr
Calculates the number of possible combinations.
!
Calculates the factorial.
RAND
Generates a random 10-digit real number between 0
and 1.
RANDI
Generates a random integer between 2 numbers that
you specify. Separate the 2 numbers with a comma.
%
h
Recalls the stored values to the display.
© 1999 T
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TI-30X ÙS: A Guide For Teachers
A-4
Quick Reference to Keys
(Continued)
A
Key Function
%
Displays the
RESET
menu.
RESET: N Y
Press
<
when
N
(no) is underlined to return to the previous screen
without resetting the calculator.
Press
<
when
Y
(yes) is underlined to reset the calculator. The
message
MEM CLEARED
is displayed.
Also, press
&
and
-
simultaneously to reset the calculator
immediately. No menu or message is displayed.
%
k
Displays the following menu that lets you convert rectangular coordinates
(
c
,
y
) to polar coordinates (
r
,
q
) or vice versa.
R
4
Pr
Converts rectangular coordinate to polar coordinate
r
.
R
4
Pq
Converts rectangular coordinate to polar coordinate
q
.
P
4
R
c
Converts polar coordinate to rectangular coordinate
c
.
P
4
Ry
Converts polar coordinate to rectangular coordinate
y
.
%
d
Displays the following numeric notation mode menu.
FLO
Restores standard mode (floating decimal).
SCI
Turns on scientific mode and displays results as a
number from 1 to 10 (1
n < 10) times 10 to an integer
power.
ENG
Turns on engineering mode and displays results as a
number from 1 to 1000 (1
n < 1000) times 10 to an
integer power. The integer power is always a multiple of
3.
>
Calculates the sine.
%
Z
Calculates the inverse sine.
%
t
Displays the following menu from which you can select
1-VAR
,
2-VAR
, or
CLRDATA
.
1-VAR
Analyzes data from 1 set of data with 1 measured
variable—
x
.
2-VAR
A
nalyzes paired data from 2 sets of data with 2
measured variables—
x
, the independent variable, and
y
,
the dependent variable.
CLRDATA
Clears data values without exiting
STAT
mode.
© 1999 T
EXAS
I
NSTRUMENTS
I
NCORPORATED
TI-30X ÙS: A Guide For Teachers
A-5
Quick Reference to Keys
(Continued)
A
Key Function
u
Displays the following menu of stat variables with their current values.
n
Number of x (or x,y) data points.
v
or
w
Mean of all x or y values.
Sx or Sy
Sample standard deviation of x or y.
s
x or
s
y
Population standard deviation of x or y.
G
x
or
G
y
Sum of all x values or y values.
G
x2
or
G
y2
Sum of all x 2 values or y 2 values.
G
xy
Sum of (x
Q
y) for all xy pairs in 2 lists.
a
Linear regression slope.
b
Linear regression y-intercept.
r
Correlation coefficient.
L
Displays the following menu of variables.
A B C D E
Lets you select a variable in which to store the
displayed value. The new variable replaces any
previously stored value.
rand
Lets you set a seed value for random integers.
@
Calculates the tangent.
%
\
Calculates the inverse tangent.
© 1999 T
EXAS
I
NSTRUMENTS
I
NCORPORATED
TI-30X ÙS: A Guide for Teachers
B-1
Display Indicators
B
Indicator
Meaning
2nd
2nd function.
HYP
Hyperbolic function.
FIX
Fixed-decimal setting.
SCI, ENG
Scientific or engineering notation.
STAT
Statistical mode.
DEG, RAD, GRAD
Angle mode (degrees, radians, or gradients).
K
Constant mode.
x10
Precedes the exponent in scientific or engineering notation.
º »
An entry is stored in history before and/or after the active screen.
Press
#
and
$
to scroll.
¸ ¹
An entry or menu displays beyond 11 digits. Press
!
or
"
to scroll.
© 1999 T
EXAS
I
NSTRUMENTS
I
NCORPORATED
TI-30X ÙS: A Guide for Teachers
C-1
Error Messages
C
Message
Meaning
ARGUMENT
A function does not have the correct number of arguments.
DIVIDE BY 0
You attempted to divide by 0.
In statistics,
n
= 1.
DOMAIN
You specified an argument to a function outside the valid range. For
example:
For
x
:
x
= 0 or
y
< 0 and
x
is not an odd integer.
For
y
x
:
y
and
x
= 0;
y
< 0 and
x
is not an integer.
For
x
:
x
< 0.
For
LOG
or
LN
:
x
0.
For
TAN
:
x
= 90
¡
,
M
90
¡
, 270
¡
,
M
270
¡
, 450
¡
, etc.
For
SIN
-
1
or
COS
-
1
: |
x
| > 1.
For
nCr
or
nPr
:
n
or
r
are not integers
0.
For
x
!
:
x
is not an integer between 0 and 69.
EQUATION
LENGTH ERROR
An entry exceeds the digit limits (88 for entry line and 47 for statistics or
constant entry lines); for example, combining an entry with a constant
that exceeds the limit.
FRQ DOMAIN FRQ
value (in
1-
variable statistics) < 0 or >99, or not an integer..
OVERFLOW
|
q
|
1
¯
10, where
q
is an angle in a trig, hyperbolic, or
R
4
Pr
function.
STAT
You pressed
u
with no defined data points.
You pressed
v
,
u
, or
%
w
when not in
STAT
mode.
Statistical analyses do not have at least 2 data points (
n
> 1).
SYNTAX
The command contains a syntax error—entering more than 23 pending
operations, 8 pending values, or having misplaced functions, arguments,
parentheses, or commas.
© 1999 T
EXAS
I
NSTRUMENTS
I
NCORPORATED
TI-30X ÙS: A Guide For Teachers
D-1
Support and Service Information
D
Product
Support
Customers in the U.S., Canada, Puerto Rico, and the Virgin
Islands
For general questions, contact Texas Instruments Customer Support:
phone:
1.800.TI.CARES (1.800.842.2737)
e-mail:
ti-cares@ti.com
For technical questions, call the Programming Assistance Group of
Customer Support:
phone:
1.972.917.8324
Customers outside the U.S., Canada, Puerto Rico, and the
Virgin Islands
Contact TI by e-mail or visit the TI calculator home page on the World Wide
Web.
e-mail:
ti-cares@ti.com
internet:
www.ti.com/calc
Product
Service
Customers in the U.S. and Canada Only
Always contact Texas Instruments Customer Support before returning a
product for service.
Customers outside the U.S. and Canada
Refer to the leaflet enclosed with this product or contact your local Texas
Instruments retailer/distributor.
Other TI
Products and
Services
Visit the TI calculator home page on the World Wide Web.
www.ti.com/calc
© 1999 T
EXAS
I
NSTRUMENTS
I
NCORPORATED
TI-30X ÙS: A Guide For Teachers
E-1
Warranty
Information
E
Customers in
the U.S. and
Canada Only
One-Year Limited Warranty for Electronic Product
This Texas Instruments (“TI”) electronic product warranty extends only to
the original purchaser and user of the product.
Warranty Duration.
This TI electronic product is warranted to the original
purchaser for a period of one (1) year from the original purchase date.
This TI electronic product is warranted against defective materials and
construction.
THIS WARRANTY IS VOID IF THE PRODUCT HAS BEEN DAMAGED BY ACCIDENT OR
UNREASONABLE USE, NEGLECT, IMPROPER SERVICE, OR OTHER CAUSES NOT ARISING OUT OF DEFECTS IN
MATERIALS OR CONSTRUCTION.
Warranty Disclaimers.
ANY IMPLIED WARRANTIES ARISING OUT OF THIS SALE, INCLUDING BUT NOT
LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, ARE
LIMITED IN DURATION TO THE ABOVE ONE-YEAR PERIOD. TEXAS INSTRUMENTS SHALL NOT BE LIABLE FOR LOSS OF
USE OF THE PRODUCT OR OTHER INCIDENTAL OR CONSEQUENTIAL COSTS, EXPENSES, OR DAMAGES INCURRED BY
THE CONSUMER OR ANY OTHER USER.
Some states/provinces do not allow the exclusion or limitation of implied
warranties or consequential damages, so the above limitations or
exclusions may not apply to you.
Legal Remedies.
This warranty gives you specific legal rights, and you may
also have other rights that vary from state to state or province to
province.
Warranty Performance.
During the above one (1) year warranty period, your
defective product will be either repaired or replaced with a reconditioned
model of an equivalent quality (at TI’s option) when the product is returned,
postage prepaid, to Texas Instruments Service Facility. The warranty of
the repaired or replacement unit will continue for the warranty of the
original unit or six (6) months, whichever is longer. Other than the postage
requirement, no charge will be made for such repair and/or replacement. TI
strongly recommends that you insure the product for value prior to mailing.
Software.
Software is licensed, not sold. TI and its licensors do not
warrant that the software will be free from errors or meet your specific
requirements.
All software is provided “AS IS.”
Copyright.
The software and any documentation supplied with this product
are protected by copyright.
All Customers
outside the
U.S. and
Canada
For information about the length and terms of the warranty, refer to your
package and/or to the warranty statement enclosed with this product, or
contact your local Texas Instruments retailer/distributor.
4


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