tanh - Hyperbolic tangent

Definition	#include <math.h> double tanh(double x); float tanhf(float x); (C11) long double tanhl(long double x); (C11) These functions calculate the hyperbolic tangent function of x. x must be in the permissible range of floating-point numbers.
Return val.	tanh(x)          for a permissible floating-point number x.
Example	The following program outputs the hyperbolic tangent of an input number. #include <math.h> #include <stdio.h> int main(void) { double x; printf("Please enter a number :\n"); scanf("%lf", &x); printf("The hyperbolic tangent of %g is %g \n", x, tanh(x)); return 0; }
See also	sin, cos, tan, atan