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# Java Math sinh() method with Examples

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

(ea – 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 also be infinity with same sign as that of argument. If the argument is zero, then the result is a zero with the same sign as the argument.

Syntax :

```public static double sinh(double a)
Parameter :
a : the value whose hyperbolic sine is to be returned.
```

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

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

 `// Java program to demonstrate working``// of java.lang.Math.sinh() method``import` `java.lang.Math;`` ` `class` `Gfg {`` ` `    ``// driver code``    ``public` `static` `void` `main(String args[])``    ``{`` ` `        ``double` `a = ``3.5``;`` ` `        ``System.out.println(Math.sinh(a));`` ` `        ``a = ``90.328``;`` ` `        ``System.out.println(Math.sinh(a));``    ``}``}`

Output:

```16.542627287634996
8.470751974588509E38
```

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

 `// Java program to demonstrate working``// of java.lang.Math.sinh() method infinity case``import` `java.lang.Math;`` ` `public` `class` `GFG {``     ` `    ``// Driver code``    ``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,``        ``// output will be negative infinity``        ``result = Math.sinh(negativeInfinity);``        ``System.out.println(result);`` ` `        ``// Here argument is positive infinity,``        ``// output will also be positive infinity``        ``result = Math.sinh(positiveInfinity);``        ``System.out.println(result);`` ` `        ``// Here argument is NaN, output will be NaN``        ``result = Math.sinh(nan);``        ``System.out.println(result);``    ``}``}`

Output:

```-Infinity
Infinity
NaN
```