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TANH(3)                    Linux Programmer's Manual                   TANH(3)



NAME
       tanh, tanhf, tanhl - hyperbolic tangent function

SYNOPSIS
       #include <math.h>

       double tanh(double x);

       float tanhf(float x);

       long double tanhl(long double x);

       Link with -lm.

DESCRIPTION
       The  tanh()  function  returns  the  hyperbolic  tangent of x, which is
       defined mathematically as sinh(x) / cosh(x).

CONFORMING TO
       SVID 3, POSIX, BSD 4.3, ISO 9899 (C99).  The float and the long  double
       variants are C99 requirements.

SEE ALSO
       acosh(3), asinh(3), atanh(3), cosh(3), sinh(3)



                                  2002-07-27                           TANH(3)