cos() Math class methodS2C Home
« Globals « Math « cos()
Description
Returns the cosine of a number in radians.
- Radians to Degrees - divide number by (
Math.PI/ 180). - Degrees to Radians - multiply number by (
Math.PI* 180).
- Like all class methods
cos()should be used on the class rather than an instance of the class.
Syntax
| Signature | Description |
|---|---|
Math.cos(value) | Returns the cosine of a number in radians. |
Parameters
| Parameter | Description |
|---|---|
value | The number you wish to find the cosine in radians for: |
Examples
The code below displays cos() usage.
/*
* Store results in an array.
*/
var cosValues = new Array(5);
cosValues[0] = Math.cos(-1);
cosValues[1] = Math.cos(0);
cosValues[2] = Math.cos('0.75');
cosValues[3] = Math.cos('a string');
cosValues[4] = Math.cos();
cosValues[5] = Math.cos(null);
alert(cosValues);
Related Tutorials
JavaScript Advanced Tutorials - Lesson 4 - Math
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