CASIO
fx-991EX
CLASSWIZ
SHIFT ALPHA M D MATH
1234567+891011=
2125578
SHIFT
ALPHA
SETUP
MENU
ON
QR
OPTN
SOLVE
=
CALC
d/dx
:
∫
Σ
log
3
√
√
x
3
DEC
x
2
√x
HEX
x
10
x
BIN
10
e
OCT
ln
log
A
(–)
FACT
B
° ′ ″
x!
C
x
-1
sin
-1
D
sin
cos
-1
E
cos
tan
-1
F
tan
RECALL
STO
∠
ENG
i
Abs
(
,
X
)
a
b
/
c
↔
d
/
c
Y
S↔D
M-
M
M+
CONST
7
CONV
8
RESET
9
INS
UNDO
DEL
OFF
AC
4
5
6
nPr
×
nCr
÷
1
2
3
Pol
+
Rec
−
Rnd
0
Ran#
RanInt
.
π
e
×10
x
%
Ans
≈
=