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atan2
Langue: en
Version: 2002-07-27 (CentOS - 06/07/09)
Section: 3 (Bibliothèques de fonctions)
NAME
atan2, atan2f, atan2l - arc tangent function of two variablesSYNOPSIS
#include <math.h> double atan2(double y, double x);Link with -lm.
float atan2f(float y, float x);
long double atan2l(long double y, long 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
SVr4, POSIX.1-2001, 4.3BSD, C89. The float and long double variants are C99 requirements.SEE ALSO
acos(3), asin(3), atan(3), cos(3), sin(3), tan(3)Contenus ©2006-2024 Benjamin Poulain
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