PHP cos() Function
Example
Return the cosine of different numbers:
<?php
echo(cos(3) . "<br>");
echo(cos(-3) . "<br>");
echo(cos(0) . "<br>");
echo(cos(M_PI) . "<br>");
echo(cos(2*M_PI));
?>
Try it Yourself »
Definition and Usage
The cos() function returns the cosine of a number.
Note: The cos() function returns a numeric value between -1 and 1, which represents the cosine of the angle.
Syntax
cos(number);
Parameter Values
| Parameter | Description |
|---|---|
| number | Required. Specifies a number |
Technical Details
| Return Value: | The cosine of number |
|---|---|
| Return Type: | Float |
| PHP Version: | 4+ |
❮ PHP Math Reference
