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

NAME
     tanh, tanhf - hyperbolic tangent functions

SYNOPSIS
     #include <math.h>

     double
     tanh(double x);

     float
     tanhf(float x);

DESCRIPTION
     The tanh() function computes the hyperbolic tangent of x.  The tanhf()
     function is a single precision version of tanh().  For a discussion of
     error due to roundoff, see math(3).

RETURN VALUES
     The tanh() and tanhf() functions return the hyperbolic tangent value.

SEE ALSO
     acos(3), asin(3), atan(3), atan2(3), cos(3), cosh(3), math(3), sin(3),
     sinh(3), tan(3)

STANDARDS
     The tanh() function conforms to ANSI X3.159-1989 (``ANSI C'').

OpenBSD 4.9                      May 31, 2007                      OpenBSD 4.9