NAME    [Toc]    [Back]

     tanh, tanhf - hyperbolic tangent functions

SYNOPSIS    [Toc]    [Back]

     #include <math.h>

     double
     tanh(double x);

     float
     tanhf(float x);

DESCRIPTION    [Toc]    [Back]

     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    [Toc]    [Back]

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

SEE ALSO    [Toc]    [Back]

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

STANDARDS    [Toc]    [Back]

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

OpenBSD      3.6                            May      2,      1991