TANH(3)

NAME
1.56 `tanh', `tanhf'--hyperbolic tangent

SYNOPSIS
     #include <math.h>
     double tanh(double X);
     float tanhf(float X);

DESCRIPTION
`tanh' computes the hyperbolic tangent of the argument X. Angles are specified in radians.
   `tanh(X)' is defined as
      sinh(X)/cosh(X)
   `tanhf' is identical, save that it takes and returns `float' values.

RETURNS
The hyperbolic tangent of X is returned.

PORTABILITY
`tanh' is ANSI C. `tanhf' is an extension.

SEE ALSO
tanh is part of the library. The full documentation for is maintained as a Texinfo manual. If info and are properly installed at your site, the command

    info

will give you access to the complete manual.