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1. Druk op @(OFF) om de
calculator uit te schakelen.
Om er zeker van te zijn dat
u niet per ongeluk de
spanning inschakelt terwijl u
de batterij vervangt schuift
u het harde etui op de
voorkant van de calculator.
2. Verwijder het deksel zoals
aangegeven in de afbeelding
en verwijder de batterij. Plaats
dan een nieuwe batterij met de
pluszijde (+) en minzijde (−) in
de juiste richting.
3. Plaats het deksel terug.
Schroef
fx-570EX
Schroef Schroef
fx-991EX
4. Initialiseer de calculator: 3@(RESET)(Initialize All)(Yes).
Sla de bovenstaande stap niet over!
Technische informatie
Berekeningsbereik en -nauwkeurigheid
Berekeningsbereik
±1 × 10
-99
tot ±9,999999999 × 10
99
of 0
Aantal cijfers voor
interne berekening
15 cijfers
Nauwkeurigheid
In het algemeen, ±1 op het 10e cijfer voor een enkele
berekening. Nauwkeurigheid voor exponentiële
weergave is ±1 op het laatste significante cijfer. Fouten
zijn cumulatief in geval van opeenvolgende
berekeningen.
Invoerbereik van functieberekeningen en
nauwkeurigheid
Functies Invoerbereik
sinx
cosx
Degree
0 |x| < 9 × 10
9
Radian
0 |x| < 157079632,7
Gradian
0 |x| < 1 × 10
10
tanx
Degree
Idem als sinx, behalve wanneer |x| = (2n−1) ×
90.
Radian
Idem als sinx, behalve wanneer |x| = (2n−1) ×
π/2.
Gradian
Idem als sinx, behalve wanneer |x| = (2n−1) ×
100.
sin
-1
x, cos
-1
x 0 |x| 1
tan
-1
x 0 |x| 9,999999999 × 10
99
sinhx, coshx
0 |x| 230,2585092
sinh
-1
x 0 |x| 4,999999999 × 10
99
cosh
-1
x 1 x 4,999999999 × 10
99
tanhx 0 |x| 9,999999999 × 10
99
tanh
-1
x 0 |x| 9,999999999 × 10
-1
logx, lnx 0 < x 9,999999999 × 10
99
10
x
-9,999999999 × 10
99
x 99,99999999
43
44


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