Java Math cosh() method with Examples

The java.lang.Math.cosh() returns the hyperbolic cosine of a double value passed to it as argument. The hyperbolic cosine of any value a is defined as,

(e^a + e^-a)/2

where e is Euler’s number.

If the argument is NaN, then the result is NaN. If the argument is infinity then the result will be positive infinity. If the argument is zero, then the result is one.

Syntax :

public static double cosh(double a)
Parameter : 
a : the value whose hyperbolic cosine is to be returned.

Return :
This method returns the hyperbolic cosine value of the argument.

Example 1 : To show working of java.lang.Math.cosh() method.

// Java program to demonstrate working
// of java.lang.Math.cosh() method
import java.lang.Math;

class Gfg {

    // driver code
    public static void main(String args[])
    {

        double a = 3.5;

        System.out.println(Math.cosh(a));

        a = 90.328;

        System.out.println(Math.cosh(a));
    }
}

Output:

16.572824671057315
8.470751974588509E38

Example 2 : To show working of java.lang.Math.cosh() method when argument is NaN or infinity.

// Java program to demonstrate working
// of java.lang.Math.cosh() method infinity case
import java.lang.Math;

public class GFG {
    public static void main(String[] args)
    {

        double positiveInfinity =
               Double.POSITIVE_INFINITY;
        double negativeInfinity =
               Double.NEGATIVE_INFINITY;
        double nan = Double.NaN;
        double result;

        // Here argument is negative infinity
        result = Math.cosh(negativeInfinity);
        System.out.println(result);

        // Here argument is positive infinity
        result = Math.cosh(positiveInfinity);
        System.out.println(result);

        // Here argument is NaN, output will be NaN
        result = Math.cosh(nan);
        System.out.println(result);
    }
}

Output:

Infinity
Infinity
NaN