# How to get the arcsine (in radians) of a number in JavaScript?

JavascriptWeb DevelopmentFront End Technology

To get the arcsine of a number in radians, use the asin() method. 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 a number is outside this range, it returns NaN.

## Example

You can try to run the following code to get the arcsine of a number −

<html>
<title>JavaScript Math asin() Method</title>

<body>

<script>
var value = Math.asin(-1);
document.write("First Value: " + value );

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

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

value = Math.asin("Demo Text");
document.write("<br />Fourth Value: " + value );
</script>

</body>
</html>
Published on 16-Feb-2018 06:40:49