Casio fx-991ZA PLUS II - Function Calculation Input Ranges and Precision

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
sinx
cosx
Deg
0 ≦ |x| < 9 × 10
9
Rad
0 ≦ |x| < 157079632,7
Gra
0 ≦ |x| < 1 × 10
10
tanx
Deg
Same as sinx, except when |x| = (2n-1) ×
90.
Rad
Same as sinx, except when |x| = (2n-1) ×
π/2.
Gra
Same as sinx, except when |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
e
x
-9,999999999 × 10
99
≦ x ≦ 230,2585092
89