NAME    [Toc]    [Back]

     atan, atanf - arc tangent functions of one variable

SYNOPSIS    [Toc]    [Back]

     #include <math.h>

     double
     atan(double x);

     float
     atanf(float x);

DESCRIPTION    [Toc]    [Back]

     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().

SEE ALSO    [Toc]    [Back]

     acos(3),  asin(3),  atan2(3),  cos(3),   cosh(3),   math(3),
sin(3), sinh(3),
     tan(3), tanh(3)

OpenBSD      3.6                            May      2,      1991