| ATAN(3) | Library Functions Manual | ATAN(3) |
atan, atanf,
atanl — arc tangent
functions of one variable
Math Library (libm, -lm)
#include <math.h>
double
atan(double
x);
float
atanf(float
x);
long double
atanl(long
double x);
The
atan()
function computes the principal value of the arc tangent of
x in the range [-pi/2, +pi/2]. The
atanf()
function is a single precision version of atan().
The
atanl()
function is an extended precision version of
atan().
acos(3), asin(3), atan2(3), cos(3), cosh(3), sin(3), sinh(3), tan(3), tanh(3)
| June 7, 2025 | Debian |