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 &pi./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 */
Related Information
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