# Java.lang.StrictMath.cosh() Method

## Description

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.

## Declaration

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

```public static double cosh(double x)
```

## Parameters

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

## Return Value

This method returns the hyperbolic cosine of x.

NA

## Example

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
```
java_lang_strictmath.htm