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

acos() - Arc cosine
sin() - Sine
tan() - Tangent
deg2rad() - Converts the number in degrees to the radian equivalent