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);

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)
