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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

 sinh(x)/cosh(x)
tanhf is identical, save that it takes and returns float values.


Returns
The hyperbolic tangent of x is returned.


Portability
tanh is ANSI C. tanhf is an extension.



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