NAME

tanh, tanhf - hyperbolic tangent function

LIBRARY

Math Library (libm, -lm)

SYNOPSIS



double tanh(double x)

float tanhf(float x)

DESCRIPTION

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

RETURN VALUES

The tanh() function returns 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 C89'') .