Javascript Math - asin Method

Description:

This method returns the arcsine in radians of a number. The asin method returns a numeric value between -pi/2 and pi/2 radians for x between -1 and 1. If the value of number is outside this range, it returns NaN.

Syntax:

Math.asin( x ) ;

Here is the detail of parameters:

x : A number.

Return Value:

Returns the arcsine in radians of a number.

Example:

<html>
<head>
<title>JavaScript Math asin() Method</title>
</head>
<body>
<script type="text/javascript">

var value = Math.asin(-1);
document.write("First Test Value : " + value ); 
  
var value = Math.asin(null);
document.write("<br />Second Test Value : " + value ); 

var value = Math.asin(30);
document.write("<br />Third Test Value : " + value ); 

var value = Math.asin("string");
document.write("<br />Fourth Test Value : " + value ); 
</script>
</body>
</html>

This will produce following result:

First Test Value : -1.5707963267948965
Second Test Value : 0
Third Test Value : NaN
Fourth Test Value : NaN

To understand it in better way you can Try it yourself.