Originální popis anglicky:
atan2, atan2f, atan2l - arc tangent function of two variables
Návod, kniha: Linux Programmer's Manual
#include <math.h>
double atan2(double y, double x);
float atan2f(float y, float x);
long double atan2l(long double y, long double x);
Link with -lm.
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.
The
atan2() function returns the result in radians, which is between -PI
and PI (inclusive).
SVID 3, POSIX, BSD 4.3, ISO 9899. The float and long double variants are C99
requirements.
acos(3),
asin(3),
atan(3),
cos(3),
sin(3),
tan(3)
