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.




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