   #PHP Manual Mathematical Functions srand tanh

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                                      tan

   (PHP 3, PHP 4 )
   tan -- Tangent

Description

   float tan ( float arg)

   tan() returns the tangent of the arg parameter. The arg parameter is
   in radians.

   Example 1. tan() example
   <?php
   echo tan(M_PI_2); // 1
   ?>

   See also atan(), sin(), cos() and deg2rad().
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