JavaScript Math.asin()
Examples
let x = Math.asin(-1);
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let x = Math.asin(0);
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let x = Math.asin(1);
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Definition and Usage
The Math.asin() method returns the arcsine (in radians) of a number.
The Math.asin() method returns a value between -PI/2 and PI/2.
The Math.asin() method expects a parameter in the range -1 to 1.
Math.asin(-1) returns -PI/2.
Math.asin(0) returns 0.
Math.asin(1) returns PI/2.
JavaScript Sine and Cosine Methods:
The Math.sin() MethodThe Math.sinh() Method
The Math.asin() Method
The Math.asinh() Method
The Math.cos() Method
The Math.cosh() Method
The Math.acos() Method
The Math.acosh() Method
Syntax
Math.asin(x)
Parameters
| Parameter | Description |
| x | Required. A number. |
Return Value
| Type | Description |
| Number | -PI/2 to PI/2.NaN if the parameter is not numeric or outside the range of -1 to 1. |
Browser Support
Math.asin() is an ECMAScript1 (ES1) feature.
ES1 (JavaScript 1997) is fully supported in all browsers:
| Chrome | IE | Edge | Firefox | Safari | Opera |
| Yes | Yes | Yes | Yes | Yes | Yes |
