Casio FX-890P Owner's Manual page 64

NPR
PURPOSE: Returns the permutation nPr for the values of n and r.
FORMAT:
NPR ( n value
Numeric expression
EXAMPLE: X = NPR(69,20)
PARAMETERS: n value and r value should follow: 0 ≤ r ≤ n < 10
EXPLANATION:
1. Returns the permutation: nPr = n! / (n-r)!
2. A fractional value as either n or r generates an error.
SEE: FACT, NCR
PI
PURPOSE: Returns the value of π.
FORMAT: PI
EXPLANATION:
1. Returns the value of π.
2. The value of π used for internal calculations is 3.1415926536.
3. The displayed value is rounded off to 10 digits, so the value of π is displayed
as 3.141592654.
POL
PURPOSE: Converts rectangular coordinates (x, y) to polar coordinates (r, θ).
FORMAT:
POL ( x-coordinate
Numeric expression
EXAMPLE: POL(3,2)
PARAMETERS: x- and y-coordinates: numeric expressions not both zero.
EXPLANATION:
1. Converts rectangular coordinates (x, y) to polar coordinates (r, Θ). The
following relational expressions are used at this time:
2 2
x + y
r = √
2. The value of r is automatically assigned to variable X, wile θ is automatically
assigned to variable Y
3. The value of θ is the ]-180°, 180°] or ]-π Radians, π Radians] range.
SEE: REC
, r value )
Numeric expression
, y-coordinate)
Numeric expression
2 2
x + y
cosθ = x / √
2
x
sinθ = y / √
64
10
2
+ y
F
0
F
0
F
0