Sharp EL-501E

– E-18 –
ERROR AND CALCULATION RANGES
Errors
An error will occur if an operation exceeds the calculation
ranges, or if a mathematically illegal operation is attempted.
In the case of an error, the display will show “E”.
An error can be cleared by pressing ª.
Calculation Ranges
• Within the ranges specified, this calculator is accurate
to ±1 of the least significant digit of the mantissa.
However, a calculation error increases in continuous
calculations due to accumulation of each calculation
error. (This is the same for y
x
,
x
¿
,
e
x
, ln , 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.
• Calculation ranges
±10
-99
~ ±9.999999999×10
99
and 0.
If the absolute value of an entry or a final or intermediate
result of a calculation is less than 10
–99
, the value is con-
sidered to be 0 in calculations and in the display.
Function Calculation Range
DEG: | x | ≤ 4.499999999 × 10
10
(tan x : | x | ≠ 90 (2n–1))*
sin x, RAD: | x | ≤ 785398163.3
tan x (tan x : | x | ≠ – (2n–1))*
GRAD: | x | ≤ 4.999999999 × 10
10
(tan x : | x | ≠ 100 (2n–1))*
DEG: | x | ≤ 4.500000008 × 10
10
cos x RAD: | x | ≤ 785398164.9
GRAD: | x | ≤ 5.000000009 × 10
10
sin
–1
x , cos
–1
x | x | ≤ 1
tan
–1
x,
3
¿x | x | < 10
100
In x , log x 10
–99
≤ x < 10
100
e
x
–10
100
< x ≤ 230.2585092
10
x
–10
100
< x < 100
π
2
501E_en0610.pm65 06/10/2004, 13:5318