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.
Пример 1. cos() example
<?php
echo cos(M_PI); // -1
?>
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See also:
acos(),
sin(),
tan(), and
deg2rad().