Casio FX-820MS kInput Ranges, Accuracy, Input Range, Internal digits:

kInput Ranges

Internal digits: 12

Accuracy*: As a rule, accuracy is ±1 at the 10th digit.

Functions			Input Range
sinx		DEG	0 x4.499999999 1010
		RAD	0 x785398163.3
		GRA	0 x4.999999999 1010
cosx		DEG	0 x4.500000008 1010
		RAD	0 x785398164.9
		GRA	0 x5.000000009 1010
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–1x		0 x1
cos–1x
tan–1x		0 x9.999999999 1099
sinhx		0 x230.2585092
coshx
sinh–1x		0 x4.999999999 1099
cosh–1x		1 x 4.999999999 1099
tanhx		0 x9.999999999 1099
tanh–1x		0 x9.999999999 10–1
logx/lnx		0 x 9.999999999 1099
10x		–9.999999999 1099x  99.99999999
ex		–9.999999999 1099x  230.2585092
		0 x  1 10100
	x
x2		x 1 1050
1/x		x 1 10100 ; x G0
3		x 1 10100
	x
x!		0 x  69 (x is an integer)
nPr		0 n  1 1010, 0 r  n (n, r are integers)
		1 {n!/(n–r)!}  1 10100
			E-32