JavaScript acos() Method
Definition and Usage
The acos() method returns the arccosine of a number as a value value between 0 and PI radians.
Note: If the parameter x is outside the range -1 to 1, the method will return NaN.
Tip: -1 will return the value of PI.
Browser Support
| Method | |||||
|---|---|---|---|---|---|
| acos() | Yes | Yes | Yes | Yes | Yes |
Syntax
Math.acos(x)
Parameter Values
| Parameter | Description |
|---|---|
| x | Required. A number |
Technical Details
| Return Value: | A Number, from 0 to PI, or NaN if the value is outside the range of -1 to 1 |
|---|---|
| JavaScript Version: | ECMAScript 1 |
