Javascript - Math acos() Method
The acos() method returns the arccosine of a number as a value value between 0 and PI radians.
Description
The acos() method returns the arccosine of a number as a value value between 0 and PI radians.
If the parameter x is outside the range -1 to 1, the method will return NaN.
-1 will return the value of PI.
Syntax
Math.acos(x)
Parameter Values
| Parameter | Require | Description |
|---|---|---|
| x | Required. | A number |
Return
A Number, from 0 to PI, or NaN if the value is outside the range of -1 to 1
Example
Return the arccosine of a number:
Demo
//display the arccosine of 0.5
console.log(Math.acos(0.5));
Result
