HP -225 Owner's Manual page 179

C
Equations Used by HP-22S
Functions
General Functions
n! n!
Cnr=—"m% ppr=—"
M — YT =
x =rcosf y=rsind
r= V2 + tan0=% —180 < 0 < 180°
number, — number,
%CHG =
#C number,
x 100
C: Equations Used by HP-22S Functions 171