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Returns the cosine of a number.
Method of Math
Static
Syntax
cos( x )
Parameters
| Parameter | Description |
|---|---|
| x | A number |
Description
The cos method returns a numeric value between -1 and 1, which represents the cosine of the angle.
Because cos is a static method of Math, you always use it as Math.cos(), rather than as a method of a Math object you created.
Examples
The following function returns the cosine of the variable x:
If x equals 2*Math.PI, getCos returns 1; if x equals Math.PI, the getCos method returns -1.
See also
Math.acos, Math.asin, Math.atan, Math.atan2, Math.sin, Math.tan