cos
-1
( ) = ? rad
2 [
√
] [ 2ndF ] [ 1/X ]
RAD
0.79
[ 2ndF ] [ cos
- 1
]
tan
-1
1 = ? grad
1 [ 2ndF ] [ tan
- 1
]
GRAD
50.00
Hyperbolic / Inverse hyperbolic functions
cosh1.5+sinh1.5 =
1.5 [ HYP ] [ cos ] [ + ]
DEG
4.48
1.5 [ HYP ] [ sin ] [ = ]
sinh
-1
7 =
7 [ HYP ] [ 2ndF ] [ sin
-1
]
DEG
2.64
tanh 1 =
1 [ HYP ] [ tan ]
DEG
0.76
Rectangular / Polar coordinates
Rectangular Coordinates
Polar Coordinates
a + b i= r (cos
θ
+ i sin
θ
)
(Note) : When using those key, make sure the calculator is set for
the angular unit you want.
Converting from Rectangular to Polar
If a = 5 and b = 6
5 [ a ] 6 [ b ]
DEG
7.81
, what are r and
θ
?
[ 2ndF ] [ R
→
P]
[ b ]
DEG
50.19
Converting from Polar to Rectangular
If r = 25 and
θ
= 56°
25 [ a ] 56 [ b ]
DEG
13.98
, what are a and b?
[ 2ndF ] [ P
→
R]
[ b ]
DEG
20.73
Permutations, Combinations
nPr =
nCr =
How many
7 [ 2ndF ] [ nPr ] 4 [ = ]
DEG
840.00
permutations of 4
items can you select
out of a set of
numbers of 7 items?
E - 12
r ! (n – r) !
n !
(n – r) !
n !
2
1
√
• P( r,
θ
)
0
X
Y
θ
r
0
X
Y
• P( x, y )
x
y
