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ceil	cosh

	Last updated: Tue, 19 Sep 2006

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.

Example 1. cos() example

<?php

echo cos(M_PI); // -1

?>

See also: acos(), sin(), tan(), and deg2rad().

ceil	cosh

	Last updated: Tue, 19 Sep 2006