double atan(double x)
Document: The C Standard Library
double atan2(double ydouble x)
Mathematical Functions: math.h
double acos(double x)
The return value is the inverse tangent
or arctangent of x.
The return value will be expressed in radians
and lie in the interval
.
McMullin@eeng.dcu.ie
Fri Mar 29 14:35:38 GMT 1996