CASIO
fx-991ES PLUS
NATURAL-V.P.A.M.
TWO WAY POWER
S
A
D
R
M
CASIO
REPLAY
SHIFT
ALPHA
MODE
ON
SOLVE
CALC
d/dx
∫dx
x!
A
x⁻¹
√
B
logₐb
∛
C
√
x³
D
x²
x⁻¹
E
xʸ
10ˣ
F
log
eˣ
G
ln
(-)
H
(−)
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I
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□⁻¹
J
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sin⁻¹
K
sin
cos⁻¹
L
cos
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M
tan
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RCL
Rnd
ENG
X
(
Y
)
▶DEC
S⇔D
M−
M+
OCT
N
7
BIN
O
8
HEX
P
9
DEL
AC
Q
4
R
5
S
6
nPr
T
×
nCr
U
÷
V
1
W
2
X
3
Y
+
Z
−
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θ
0
π
r
.
e
i
×10ˣ
DRG▶
Ans
EXE