Citizen SR-260 - Hyperbolic; Inverse hyperbolic functions; Rectangular; Polar coordinates

E-12
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
+ i sin )
(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
? [ 2ndF ] [ R P]
[ b ]
DEG
50.19
Converting from Polar to Rectangular
If r = 25 and
= 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?
r ! (n – r) !
n !
(n – r) !
n !
• P( r, )
0
X
Y
r
0
X
Y
• P( x, y )
x
y
2
1