NAME
atan, atanf,
atanl —
arc tangent functions of one
variable
SYNOPSIS
#include
<math.h>
double
atan(double
x);
float
atanf(float
x);
long double
atanl(long
double x);
DESCRIPTION
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().
SEE ALSO
acos(3), asin(3), atan2(3), cos(3), cosh(3), sin(3), sinh(3), tan(3), tanh(3)