atan2.c File Reference

#include "../math.h"

Functions
double	atan2 (double x, double y)
	Compute arc tangent with two parameters. More...

Function Documentation

atan2()

double atan2	(	double	x,
		double	y
	)

Compute arc tangent with two parameters.

The atan2 functions compute the value of the arc tangent of y/x, using the signs of both arguments to determine the quadrant of the return value. A domain error may occur if both arguments are zero.

Parameters

x	Value representing the proportion of the y-coordinate.
y	Value representing the proportion of the x-coordinate.

Returns

The atan2 functions return arctan y/x in the interval [−π , +π ] radians.