PHP Manual: cos


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cos

(PHP 3, 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

?>