php man page for tan

TAN(3)									 1								    TAN(3)

tan - Tangent

SYNOPSIS
       float tan (float  $arg)

DESCRIPTION
       tan(3) returns the tangent of the $arg parameter. The $arg parameter is in radians.

PARAMETERS
	      o $arg
		- The argument to process in radians

RETURN VALUES
	The tangent of $arg

EXAMPLES
       Example #1

	      tan(3) example

	      <?php

	      echo tan(M_PI_4); // 1

	      ?>

SEE ALSO
       atan(3), atan2(3), sin(3), cos(3), tanh(3), deg2rad(3).

PHP Documentation Group 														    TAN(3)