Workaround for cotangent function
<?php
//FOR PHP 4
function cot($rad)
{
return tan(M_PI_2 - rad2deg($rad));
}
//FOR PHP 3
function cot($rad)
{
return tan(M_PI/2 - rad2deg($rad));
}
?>
tan
(PHP 4, PHP 5)
tan — Oblicza tangens kąta
georgedot at gmail dot com
10-Sep-2009 07:50
fformula at gmail dot com
09-Apr-2006 11:26
To find cotangent you can use
tan (M_PI/2 - $alfa)
