What is PhpDig?
PhpDig is a PHP MySQL based
Web Spider & Search Engine.



tan — Provides the tangent for the given radians.


float tan(fl);
float fl: Value to be calculated


Tangent of a value in radians


Returns the tangent of a value in radians.


PHP 3, PHP 4

See also

See also acos() , asin() , atan() , atan2() , cos() , sin()


Example 694. Calculate the tangent of a value

$rads = 2 * (pi() / 3); // a 120 degree arc
$rtan = tan($trad);
echo "The tangent of $rads is $rtan\n";

PHP Functions Essential Reference. Copyright © 2002 by New Riders Publishing (Authors: Zak Greant, Graeme Merrall, Torben Wilson, Brett Michlitsch). This material may be distributed only subject to the terms and conditions set forth in the Open Publication License, v1.0 or later (the latest version is presently available at The authors of this book have elected not to choose any options under the OPL. This online book was obtained from and is designed to provide information about the PHP programming language, focusing on PHP version 4.0.4 for the most part. The information is provided on an as-is basis, and no warranty or fitness is implied. All persons and entities shall have neither liability nor responsibility to any person or entity with respect to any loss or damage arising from the information contained in this book.

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