TANH(3) 		   Linux Programmers Manual		      TANH(3)



NAME
       tanh, tanhf, tanhl - hyperbolic tangent function

SYNOPSIS
       #include 

       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:

	   tanh(x) = sinh(x) / cosh(x)

CONFORMING TO
       SVr4, 4.3BSD, C89.  The float and long double variants are C99 require
       ments.

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

COLOPHON
       This  page  is  part of release 3.05 of the Linux man-pages project.  A
       description of the project, and information about reporting  bugs,  can
       be found at http://www.kernel.org/doc/man-pages/.



				  2007-12-26			       TANH(3)