redhat man page for tanh

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

NAME
       tanh - hyperbolic tangent function

SYNOPSIS
       #include <math.h>

       double tanh(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)

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

								    1993-06-13								   TANH(3)