Java.lang.StrictMath.tanh() Method



The java.lang.StrictMath.tanh() method returns the hyperbolic tangent of a double value. The hyperbolic tangent of x is defined to be (ex - e-x)/(ex + e-x).It include these cases:

  • If the argument is NaN, then the result is NaN.
  • If the argument is zero, then the result is a zero with the same sign as the argument.
  • If the argument is positive infinity, then the result is +1.0.
  • If the argument is negative infinity, then the result is -1.0.


Following is the declaration for java.lang.StrictMath.tanh() method

public static double tanh(double x)


  • x -- This is the number whose hyperbolic tangent is to be returned.

Return Value

This method returns the hyperbolic tangent of x.


  • NA


The following example shows the usage of java.lang.StrictMath.tanh() method.

package com.tutorialspoint;

import java.lang.*;

public class StrictMathDemo {

   public static void main(String[] args) {
   double d1 = (90*Math.PI)/180 , d2 = 0.0;
   double d3 = (1.0)/(0.0), d4 = -(1.0)/(0.0);

   // returns the hyperbolic trigonometric tangent of an angle.

   double tanhValue = StrictMath.tanh(d1); 
   System.out.println("hyperbolic tangent of d1 = " + tanhValue);
   tanhValue = StrictMath.tanh(d2); 
   System.out.println("hyperbolic tangent of d2 = " + tanhValue);
   tanhValue = StrictMath.tanh(d3); 
   System.out.println("hyperbolic tangent of d3 = " + tanhValue);
   tanhValue = StrictMath.tanh(d4); 
   System.out.println("hyperbolic tangent of d4 = " + tanhValue);

Let us compile and run the above program, this will produce the following result:

hyperbolic tangent of d1 = 0.9171523356672744
hyperbolic tangent of d2 = 0.0
hyperbolic tangent of d3 = 1.0
hyperbolic tangent of d4 = -1.0