Sharp EL-9900 operation manual Calculation Range, Arithmetic calculation, Function calculation

Appendix

6. Calculation Range

1. Arithmetic calculation

The results for dividend, multiplicand and operand are:

-1 ⋅ 10100 < x ≤ -1 ⋅ 10-99, 1 ⋅ 10-99< x ≤ 1 ⋅ 10100 or x = 0 (valid within the range of display capability)

Note: Calculation results and input values less than 1 ⋅ 10-99are considered equal to 0.

2. Function calculation

Calculation accuracy

In principle, calculation errors are ±1 of the last digit. (In case of exponential display, the calculation errors are ±1 of the last digit of the mantissa display.)

However, a calculation error increases in continuous calculations due to accumulation of each calculation error. (This is the same for ab, a b , n!, ex, In, etc. where continuous calculations are performed internally.)

Additionally, a calculation error will accumulate and become larger in the vicinity of inflection points and singular points of functions. (for example, calculating sinh X or tanh X at X = 0)

Function				Calculation range				Notes
	DEG	: x < 1 ⋅ 1010
	RAD	: x <		π		⋅ 1010
			180
sin x	GRAD	: x <	10		⋅ 10		10
cos x			9
	However, the following are excluded for tan x
tan x	DEG	: x = 90 (2n – 1)
	RAD	: x =		π	(2n – 1)			“n” is an integer
				2
	GRAD	: x = 100 (2n – 1)
sin-1x	-1 ≤ x ≤ 1
cos-1x
tan-1x	x < 1 ⋅ 10100
sinh x
cosh x	-230.2585093 ≤ x ≤ 230.2585092
tanh x
sinh-1x	x < 1 ⋅ 1050
cosh-1x	1 ≤ x ≤ 1 ⋅ 1050
tanh-1x	x < 1

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