atan3
Arc tangent functions of one variable
Usage
#include <math.h>
double
atan(double x);
float
atanf(float x);
long double
atanl(long double x);
Library
Math Library (libm, -lm)
Overview
The atan(), atanf(), and atanl() functions compute the principal value of the arc tangent of x.
Return values
These functions return the arc tangent in the range [-/2, +/2] radians.
Releases
87 releases since FreeBSD 2.0.5-RELEASE; the text changed 44 times.