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PHP cos() Function

PHP Math Reference PHP Math Reference

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));
?>

Run example »

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 Description
number Required. Specifies a number

Technical Details

Return Value: The cosine of number
Return Type: Float
PHP Version: 4+


PHP Math Reference PHP Math Reference

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