Java.lang.StrictMath.cosh() Method


The java.lang.StrictMath.cosh() method returns the hyperbolic cosine of a double value. The hyperbolic cosine of x is defined to be (ex + e-x)/2 where e is Euler's number.It include these cases −

  • If the argument is NaN, then the result is NaN.
  • If the argument is infinite, then the result is positive infinity.
  • If the argument is zero, then the result is 1.0.


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

public static double cosh(double x)


x − This is the number whose hyperbolic cosine is to be returned.

Return Value

This method returns the hyperbolic cosine of x.




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

package com.tutorialspoint;

import java.lang.*;

public class StrictMathDemo {

   public static void main(String[] args) {

      double d1 = (60*(Math.PI))/180 , d2 = 0.0, d3 = (1.0/0.0) ;
      // returns the hyperbolic cosine of specified angle in radian
      double coshValue = StrictMath.cosh(d1); 
      System.out.println("Hyperbolic cosine of d1 = " + coshValue);

      coshValue = StrictMath.cosh(d2); 
      System.out.println("Hyperbolic cosine of d2 = " + coshValue);

      coshValue = StrictMath.cosh(d3); 
      System.out.println("Hyperbolic cosine of d3 = " + coshValue);

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

Hyperbolic cosine of d1 = 1.600286857702386
Hyperbolic cosine of d2 = 1.0
Hyperbolic cosine of d3 = Infinity