trigonometry related functions

A library of trigonometry related functions   <?php // PHP Mathematics Library – Trigonometry // // Copyright (c) 2008, reusablecode.blogspot.com; some rights reserved. // // This work is licensed under the Creative Commons Attribution License. To view // a copy of this license, visit http://creativecommons.org/licenses/by/3.0/ or // send a letter to Creative Commons, 559 Nathan […]