Casio fx-991ES PLUS User Manual
Page 40
E-39
tanh
–1
x
0
\
x
\
–1
log
x
/ln
x
0
x
99
10
x
–9.999999999
s
99
x
99.99999999
e
x
–9.999999999
s
99
x
230.2585092
'
x
0
x
1 s
100
x
2
\
x
\
50
x
–1
\
x
\
100
;
x
& 0
3
x
\
x
\
100
x
!
0
x
69 (
x
is an integer)
n
Pr
0
n
1 s
10
, 0
r
n
(
n
,
r
are integers)
1
{
n
!/(
n
–
r
)!}
1 s
100
n
Cr
0
n
1 s
10
, 0
r
n
(
n
,
r
are integers)
1
n
!/
r
!
1 s
100
or 1
n
!/(
n
–
r
)!
1 s
100
Pol(
x
,
y
)
\
x
\, \
y
\
99
x
2
+
y
2
99
Rec(
r
, θ)
0
r
99
θ
: Same as sin
x
°’ ”
\
a
\,
b
,
c
1 s
100
0
b
,
c
The display seconds value is subject to an error of
2
1 at
the second decimal place.
\
x
\
100
Decimal
j Sexagesimal Conversions
0°0
0˝ \
x
\
x
y
x
100
y
log
x
x
y
x
y
=
n
,
m
2
n
+1
(
m
,
n
are integers)
However: –1
s
100
y
log
\
x
\
x
y
y
x
& 0, –1 s
100
x
log
y
y
x
y
x
= 2
n
+1,
2
n
+1
m
(
m
& 0;
m
,
n
are integers)
However: –1
s
100
x
log
\
y
\
a
b
/
c
Total of integer, numerator, and denominator must be 10
digits or less (including division marks).
RanInt#(
a
,
b
)
a
b
; \
a
\, \
b
\
10
;
b
–
a
10
• Precision is basically the same as that described under “Calculation Range
and Precision”, above.
•
x
y
,
x
'
y
,
3
,
x
!, nPr, nCr type functions require consecutive internal
calculation, which can cause accumulation of errors that occur with each
calculation.
• Error is cumulative and tends to be large in the vicinity of a function’s singular
point and inflection point.