tanh()                   Calculate Hyperbolic Tangent
 
 #include   <math.h>
 
 double     tanh(x);
 double     x;                           Radians
 
    tanh() returns the hyperbolic tangent of 'x'.
 
    Returns:    The hyperbolic tangent of 'x'.  There is no error return.
 
  -------------------------------- Example ---------------------------------
 
    The following statements print the hyperbolic tangent of -3.1416.
 
         #include <math.h>
         #include <stdio.h>       /* for printf() */
 
         main()
         {
             double htangent;
 
             htangent = tanh(-3.1416);  /* htangent = -0.9962721 */
             printf("hyperbolic tangent of -3.1416 radians = %e\n",
                     htangent);
         }

Seealso:


 tan() 
 atan() 
 sin() 
 sinh()