Java - Math cosh(double) method

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Description

The Java Math cosh(double a) returns the hyperbolic cosine of a double value. Special 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.

The computed result must be within 2.5 ulps of the exact result.

Declaration

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

public static double cosh(double x)

Parameters

x − The number whose hyperbolic cosine is to be returned.

Return Value

This method returns the hyperbolic cosine of x.

Exception

NA

Example 1

The following example shows the usage of Math cosh() method.

package com.tutorialspoint;
public class MathDemo {
   public static void main(String[] args) {

      // get a variable x which is equal to PI/2
      double x = Math.PI / 2;

      // convert x to radians
      x = Math.toRadians(x);

      // get the hyperbolic cosine of x
      System.out.println("Math.cosh(" + x + ")=" + Math.cosh(x));
   }
}

Output

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

Math.cosh(0.027415567780803774)=1.0003758302174048

Example 2

The following example shows the usage of Math cosh() method of 0° angle.

package com.tutorialspoint;
public class MathDemo {
   public static void main(String[] args) {

      // get a variable x which is equal to zero
      double x = 0.0d;

      // convert x to radians
      x = Math.toRadians(x);

      // get the hyperbolic cosine of x
      System.out.println("Math.cos(" + x + ")=" + Math.cosh(x));
   }
}

Output

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

Math.cos(0.0)=1.0

Example 3

The following example shows the usage of Math cosh() method of 45° angle.

package com.tutorialspoint;
public class MathDemo {
   public static void main(String[] args) {

      // get a variable x which is equal to zero
      double x = 45.0d;

      // convert x to radians
      x = Math.toRadians(x);

      // get the hyperbolic cosine of x
      System.out.println("Math.cosh(" + x + ")=" + Math.cosh(x));
   }
}

Output

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

Math.cosh(0.7853981633974483)=1.3246090892520057