Sharp EL-738XT Operation Manual page 80

Calculation ranges of functions
• Within the ranges specifi ed, this calculator is accurate to within ±1
of the least signifi cant digit of the mantissa. However, a calculation
error increases in continuous calculations due to accumulation of
each calculation error. (This is the same for fi nancial calculations,
scientifi c calculations [ y
calculations are performed internally.)
Additionally, a calculation error will accumulate and become larger
in the vicinity of infl ection points and singular points of functions.
In fi nancial calculations, a calculation error increases if the
interest is low or the number of payments is high. Press s
if you'd like to cancel the calculation while the "calculating!"
screen is displayed.
• Calculation ranges
to ±9.999999999  10
–99
±10
If the absolute value of an entry or a fi nal or intermediate result
of a calculation is less than 10
0 in calculations and in the display.
Function
sin x , cos x ,
tan x
–1 –1
sin x , cos x
–1
tan x
In x , log x
y x
x x
, , e
DEG: | x | < 10
(tan x : | x |  90 (2n – 1))*

RAD: | x | < —  10
180
(tan x : | x |  — (2n – 1))*
10
GRAD: | x | < —  10
(tan x : | x |  100 (2n – 1))*
| x |  1
100
| x | < 10
 x <  10
–99 100
10
100
• y > 0: –10
• y = 0: 0 <  x < 10
• y < 0: x = n
(0 <  | x | < 1:
<  x log | y | < 100
100
–10
x
, ln, n!, etc.], where continuous
99
and 0.
–99
, the value is considered to be
Calculation range
10
10

2
10
9
<  x log y < 100
100
1
= 2n – 1, x  0),*
—
x
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