Syntax
#include <math.h>
double atan2(double y, double x);
float atan2f(float y, float x);
Arguments
x
y
Return Value
The arc tangent of y divided by x (y/x)
Description
Returns the arc tangent of y divided by x (y/x):
atan(t) = t / (1+(t^2/(3+(2^2*t^2/(5+(3^2*t^2/(7+....)))))))