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JavaScript asin() Method
JavaScript Math Object
Definition and Usage
The asin() method returns the arcsine of a number as a numeric value between -PI/2 and PI/2 radians.
Note: If the parameter x is outside the range -1 to 1, the browser will return NaN.
Syntax
Math.asin(x)
| Parameter | Description |
|---|---|
| x | Required. A number |
Browser Support
The asin() method is supported in all major browsers.
Tips and Notes
Tip: 1 will return the value of PI/2.
Example
Example
Return the arcsine of different numbers:
<script type="text/javascript">
document.write(Math.asin(0.64) + "<br />");
document.write(Math.asin(0) + "<br />");
document.write(Math.asin(-1) + "<br />");
document.write(Math.asin(1) + "<br />");
document.write(Math.asin(2));
</script>
document.write(Math.asin(0.64) + "<br />");
document.write(Math.asin(0) + "<br />");
document.write(Math.asin(-1) + "<br />");
document.write(Math.asin(1) + "<br />");
document.write(Math.asin(2));
</script>
The output of the code above will be:
0.6944982656265559
0
-1.5707963267948965
1.5707963267948965
NaN
0
-1.5707963267948965
1.5707963267948965
NaN
Try it yourself »
JavaScript Math Object
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Tutorials, references, and examples are constantly reviewed to avoid errors, but we cannot warrant full correctness of all content.
While using this site, you agree to have read and accepted our terms of use and privacy policy.
Copyright 1999-2012 by Refsnes Data. All Rights Reserved.
Tutorials, references, and examples are constantly reviewed to avoid errors, but we cannot warrant full correctness of all content.
While using this site, you agree to have read and accepted our terms of use and privacy policy.
Copyright 1999-2012 by Refsnes Data. All Rights Reserved.