Format
#include <math.h>
double tanh(double x);
Language Level: ANSI
Threadsafe: Yes.
Description
The tanh() function calculates the hyperbolic tangent of x, where x is expressed in radians.
Return Value
The tanh() function returns the value of the hyperbolic tangent of x. The result of tanh() cannot have a range error.
Example that uses tanh()
This example computes x as the hyperbolic tangent of π/4.
#include <math.h>
#include <stdio.h>
int main(void)
{
double pi, x;
pi = 3.1415926;
x = tanh(pi/4);
printf("tanh( %lf ) = %lf\n", pi/4, x);
}
/****************** Output should be similar to: ****************
tanh( 0.785398 ) = 0.655794
*/
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