tanh, tanhf—hyperbolic tangent #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.