ATAN2 Section: Linux Programmer's Manual (3) Updated: June 8, 2025 Index   NAME atan2 - 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   Index NAME SYNOPSIS DESCRIPTION RETURN VALUE CONFORMING TO SEE ALSO This document was created by using the manual pages. Time: 11:58:02 GMT, March 24, 2025