CITIZEN SR-275EU - Manual (Page 12)

SR17D-D1-E.doc SIZE:140x75mm SCALE 2:1 2003/9/15
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Coordinates transformation
Rectangular Coordinates Polar Coordinates
Y
0 X
P(x, y)
x
y
Y
0 X
P(r, )
θ
r
x+ y i = r (cos + sin ) θ θ
θ
• The calculator can perform the conversion between rectangular
coordinates and polar coordinates by [ ALPHA ] [ Pol ( ] and
[ ALPHA ] [ Rec ( ]. Calculation results are automatically stored in
memory variables E and F. See Example 24.
(Note) : When using those key, make sure the calculator is set for
the angle unit you want.
„
Probability
• This calculator provides the following probability functions : ( See
Example 25.)
[ nPr ] Calculates the number of possible permutations
of n item taken r at a time.
[ nCr ] Calculates the number of possible combinations
of n items taken r at a time.
[ x! ] Calculates the factorial of a specified positive
integer x , where x 싪 69.
[ RANDOM ] Generates a random number between 0.000 and
0.999
„
Other functions ( x –1 , , 3 , y , x 2 , x 3 , x y )
• The calculator also provides reciprocal ( [ x
–1
] ), square root
( [ ] ), cubic root ( [
3
] ), universal root [
y
], square ( [ x
2
] ),
cubic ( [ x
3
] ) and exponentiation ( [ x
y
] ) functions. See Example
26.
Standard Deviation Calculation
ſ Use the SD mode for standard deviation calculations.
• Always make sure you clear statistical memory by [ 2nd ] [ Scl ]
before preforming standard deviation calculation.
• Individual data can be input using [ DT ] ; To delete data you just
input, please press [ 2nd ] [ CL ]. Multiple data of the same value
can be input using [ 2nd ] [ ; ]. For example, to input the data 15
seven times, press 15 [ 2nd ] [ ; ] 7 [ DT ].