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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
acos(3)
, asin(3)
, atan(3)
, cos(3)
,
sin(3)
, tan(3)
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