586021
15
Zoom out
Zoom in
Previous page
1/46
Next page
Clearing the Contents of All Memories
Ans memory, independent memory, and variable contents are retained even
if you press , change the calculation mode, or turn off the calculator.
Perform the procedure below when you want to clear the contents of all
memories.
(RESET)(Memory)(Yes)
Function Calculations
Note: To interrupt an ongoing calculation before its result appears, press
.
Pi π: π is displayed as 3.141592654, but π = 3.14159265358980 is used for
internal calculations.
Natural Logarithm Base e: e is displayed as 2.718281828, but e =
2.71828182845904 is used for internal calculations.
sin, cos, tan, sin
-1
, cos
-1
, tan
-1
: Specify the angle unit before performing
calculations.
sin 30° =
1
2
(Angle Unit: Degree)
30
1
2
sinh, cosh, tanh, sinh
-1
, cosh
-1
, tanh
-1
: Input a function from the menu that
appears when you press (Hyperbolic Func)*
1
. The angle unit setting
does not affect calculations.
*1 Depending on the calculation mode, you should press .
,
r
,
g
: These functions specify the angle unit. ° specifies degree,
r
radian,
and
g
gradian. Input a function from the menu that appears when you
perform the following key operation: (Angle Unit)*
2
.
π/2 radians = 90° (Angle Unit: Degree)
(π)2(Angle Unit)(
r
)
90
*2 Depending on the calculation mode, you should press .
, : Exponential functions.
e
5
× 2 = 296.8263182
(MathI/MathO)
() 52
296.8263182
(LineI/LineO)
() 52
296.8263182
log: Logarithmic function. Use (log) to input log
a
b as log (a, b).
Base 10 is the default setting if you do not input anything for a.
log
10
1000 = log 1000 = 3
(log) 1000
3
log
2
16 = 4
(log) 2(,) 16
4
The key also can be used for input, but only while MathI/MathO or
MathI/DecimalO is selected for Input/Output on the setup menu. In this
case, you must input a value for the base.
log
2
16 = 4
216
4
ln: Natural logarithm to base e.
ln 90 (= log
e
90) = 4.49980967
90
4.49980967
x
2
, x
3
, , , , , x
-1
: Powers, power roots, and reciprocals.
(1 + 1)
2+2
= 16
1122
16
(5
2
)
3
= 15625
5(x
3
)
15625
32
5
= 2
(MathI/MathO)
() 532
2
14
15


Need help? Post your question in this forum.

Forumrules


Report abuse

Libble takes abuse of its services very seriously. We're committed to dealing with such abuse according to the laws in your country of residence. When you submit a report, we'll investigate it and take the appropriate action. We'll get back to you only if we require additional details or have more information to share.

Product:

For example, Anti-Semitic content, racist content, or material that could result in a violent physical act.

For example, a credit card number, a personal identification number, or an unlisted home address. Note that email addresses and full names are not considered private information.

Forumrules

To achieve meaningful questions, we apply the following rules:

Register

Register getting emails for Casio fx-991EX at:


You will receive an email to register for one or both of the options.


Get your user manual by e-mail

Enter your email address to receive the manual of Casio fx-991EX in the language / languages: English as an attachment in your email.

The manual is 0,95 mb in size.

 

You will receive the manual in your email within minutes. If you have not received an email, then probably have entered the wrong email address or your mailbox is too full. In addition, it may be that your ISP may have a maximum size for emails to receive.

Others manual(s) of Casio fx-991EX

Casio fx-991EX User Manual - Dutch - 48 pages


The manual is sent by email. Check your email

If you have not received an email with the manual within fifteen minutes, it may be that you have a entered a wrong email address or that your ISP has set a maximum size to receive email that is smaller than the size of the manual.

The email address you have provided is not correct.

Please check the email address and correct it.

Your question is posted on this page

Would you like to receive an email when new answers and questions are posted? Please enter your email address.



Info