ATAN2 (3)
arc tangent function of two variables
SYNOPSIS
#include <math.h>
double atan2(double y , double x );
DESCRIPTION
The atan2() function calculates the arc tangent of the two
variables x and y. It is similar to calculating the
arc tangent of y / x, except that the signs of both
arguments are used to determine the quadrant of the result.
RETURN VALUE
The atan2() function returns the result in radians, which
is between -PI and PI (inclusive).
CONFORMING TO
SVID 3, POSIX, BSD 4.3, ISO 9899
SEE ALSO
|
