NAME    [Toc]    [Back]

     tanh, tanhf - hyperbolic tangent function

LIBRARY    [Toc]    [Back]

     Math Library (libm, -lm)

SYNOPSIS    [Toc]    [Back]

     #include <math.h>

     double
     tanh(double x);

     float
     tanhf(float x);

DESCRIPTION    [Toc]    [Back]

     The tanh() and tanhf() functions compute the hyperbolic tangent of x.
     For a discussion of error due to roundoff, see math(3).

RETURN VALUES    [Toc]    [Back]

     The tanh() function returns 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'').

BSD                               May 2, 1991                              BSD