tanh, tanhf[hyperbolic tangent]

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tanh, tanhf
[hyperbolic tangent]

SYNOPSIS
#include <math.h>
double tanh(double x);
float tanhf(float x);

DESCRIPTION
tanh computes the hyperbolic tangent of the argument, x. Angles are specified in radians.

tanh(x) is defined as the following input.

    sinh(x)/cosh(x)

tanhf is identical, save that it takes and returns float values.

RETURNS
The hyperbolic tangent of x is returned.

COMPLIANCE
tanh is ANSI C. tanhf is an extension.