This method returns the arcsine of the number in radians. The ASIN method returns a value between -1 and 1, x-pi/2 and PI/2 radians. If the number value is outside this range, NaN is returned.
Grammar
Math.asin( x ) ;
Here are the details of the parameters:
Return value:
Returns the arcsine of a number in radians.
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 the following results:
First Test Value : -1.5707963267948965 Second Test Value : 0 Third Test Value : NaN Fourth Test Value : NaN
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