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.
Syntax
| Parameter |
Description |
| x |
Required. Must be a numeric value in the range -1 to 1 |
Tips and Notes
Note: If the parameter x is outside the range -1 to 1, the browser will return NaN.
Note: 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>
|
The output of the code above will be:
0.6944982656265559
0
-1.5707963267948965
1.5707963267948965
NaN
|
Try it yourself »
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JavaScript Math Object
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