# StrictMath asin() Method in Java With Examples

• Last Updated : 19 Jul, 2018

The java.lang.StrictMath.asin() is an inbuilt method of StrictMath class which is used to return the arc sine of a specified value. The returned angle is in within the range of -pi/2 and pi/2. The method gives rise to two special results:

• If the absolute value of the argument is greater than 1 or the argument is itself a NaN then the result is also NaN.
• If the passed argument is 0, then the output is also 0 with the same sign as the argument.

Syntax :

`public static double asin(double val)`

Parameters: This method accepts one parameter val of double type and refers to the value whose arc sine is to be returned.

Return Value : The method returns the arc sine value of the argument.
Examples :

```Input: val = 0.72
Output: 0.80380231893303

Input: val = 7.0
Output: NAN

Input: val = 0.0
Output: 0.0
```

Below programs illustrate the java.lang.StrictMath.asin() method:
Program 1:

 `// Java program to illustrate the``// java.lang.StrictMath.asin()``import` `java.lang.*;`` ` `public` `class` `Geeks {`` ` `    ``public` `static` `void` `main(String[] args)``    ``{`` ` `        ``double` `val1 = ``0.65``, val2 = ``3.00``, val3 = ``0``;`` ` `        ``double` `asinvalue = StrictMath.asin(val1);``        ``System.out.println(``" The arc sine value is = "``+``                                            ``asinvalue);`` ` `        ``asinvalue = StrictMath.asin(val2);``        ``System.out.println(``"The arc sine value is = "``+``                                            ``asinvalue);``                           ` `        ``asinvalue = StrictMath.asin(val3);``        ``System.out.println(``"The arc sine value is = "``+``                                           ``asinvalue);``    ``}``}`

Output:

```The arc sine value is = 0.7075844367253556
The arc sine value is = NaN
The arc sine value is = 0.0
```

Program 2:

 `// Java program to illustrate the``// java.lang.StrictMath.asin()``import` `java.lang.*;`` ` `public` `class` `Geeks {`` ` `    ``public` `static` `void` `main(String[] args)``    ``{`` ` `        ``double` `val1 = -``0.85``, val2 = -``2.00``, val3 = ``0``;`` ` `        ``double` `asinvalue = StrictMath.asin(val1);``        ``System.out.println(``" The arc sine value is = "``+``                                            ``asinvalue);`` ` `        ``asinvalue = StrictMath.asin(val2);``        ``System.out.println(``"The arc sine value is = "``+``                                            ``asinvalue);`` ` `        ``asinvalue = StrictMath.asin(val3);``        ``System.out.println(``"The arc sine value is= "``+``                                            ``asinvalue);``    ``}``}`

Output:

```The arc sine value is = -1.015985293814825
The arc sine value is = NaN
The arc sine value is= 0.0
```

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