Math
PHP Manual

cos

(PHP 4, PHP 5)

cos — Cosine

Description

float cos ( float $arg )

cos() returns the cosine of the arg parameter. The arg parameter is in radians.

Parameters

arg

An angle in radians

Return Values

The cosine of arg

Examples

Example#1 cos() example

<?php

echo cos(M_PI); // -1

?>

See Also


Math
PHP Manual