Casio fx-82AR X, User Manual, Page: 24 / 27

Precision
In general, ±1 at the 10th digit for a single
calculation. Precision for exponential display is
±1 at the least significant digit. Errors are
cumulative in the case of consecutive
calculations.
Function Calculation Input Ranges and Precision
Functions Input Range
sin
x
cos
x
Degree 0
≦
|
x
| < 9 × 10
9
Radian 0
≦
|
x
| < 157079632.7
Gradian 0
≦
|
x
| < 1 × 10
10
tan
x
Degree Same as sin
x
, except when |
x
| = (2
n
−1) × 90.
Radian
Same as sin
x
, except when |
x
| = (2
n
−1) ×
π
/2.
Gradian
Same as sin
x
, except when |
x
| = (2
n
−1) ×
100.
sin
-1
x
, cos
-1
x
0
≦
|
x
|
≦
1
tan
-1
x
0
≦
|
x
|
≦
9.999999999 × 10
99
sinh
x
, cosh
x
0
≦
|
x
|
≦
230.2585092
sinh
-1
x
0
≦
|
x
|
≦
4.999999999 × 10
99
cosh
-1
x
1
≦
x
≦
4.999999999 × 10
99
tanh
x
0
≦
|
x
|
≦
9.999999999 × 10
99
tanh -1
x
0
≦
|
x
|
≦
9.999999999 × 10 -1
log
x
, ln
x
0 <
x
≦
9.999999999 × 10 99
10
x
-9.999999999 × 10
99
≦
x
≦
99.99999999
e
x
-9.999999999 × 10
99
≦
x
≦
230.2585092
𝑥
0
≦
x
< 1 × 10
100
x
2
|
x
| < 1 × 10
50
x
-1
|
x
| < 1 × 10
100
;
x
≠ 0
𝑥
3
|
x
| < 1 × 10
100
x
! 0
≦
x
≦
69 (
x
is an integer)
n
P
r
0
≦
n
< 1 × 10 10 , 0
≦
r
≦
n
(
n
,
r
are integers)
1
≦
{
n
!/(
n
−
r
)!} < 1 × 10
100
n
C
r
0
≦
n
< 1 × 10
10
, 0
≦
r
≦
n
(
n
,
r
are integers)
1
≦
n
!/
r
! < 1 × 10
100
or 1
≦
n
!/(
n
−
r
)! < 1 × 10
100
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