CASIO fx-991EX
M
DEG
0
Scientific Mode
sin
cos
tan
log
ln
√
sin⁻¹
cos⁻¹
tan⁻¹
e
π
xʸ
|x|
x!
%
DEG/RAD
(
)
MC
MR
M+
M-
MS
x²
AC
C
⌫
÷
×
7
8
9
−
+
4
5
6
±
1
2
3
.
=
0
1/x
Ans