Definition and Usage
The cos() method returns the cosine of a number.
Syntax
| Parameter | Description |
| x | Required. A number |
Tips and Notes
Note: The cos() method returns a numeric value between -1 and 1, which represents the cosine of the angle.
Example
In the following example we will return the cosine of different numbers:
<script type="text/javascript"> document.write(Math.cos(3) + "<br />");
document.write(Math.cos(-3) + "<br />");
document.write(Math.cos(0) + "<br />");
document.write(Math.cos(Math.PI) + "<br />");
document.write(Math.cos(2*Math.PI)); </script> |
The output of the code above will be:
-0.9899924966004454
-0.9899924966004454
1
-1
1 |
