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tan

(PHP 4, PHP 5)

tanTangent

Description

float tan ( float $arg )

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

Parameters

arg

The argument to process in radians

Return Values

The tangent of arg

Examples

Example #1 tan() example

<?php

echo tan(M_PI_4); // 1

?>

See Also


User Contributed Notes
tan
georgedot at gmail dot com
10-Sep-2009 08:50
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));
}
?>
fformula at gmail dot com
10-Apr-2006 12:26
To find cotangent you can use
  tan (M_PI/2 - $alfa)
 

 
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