PHP 5.4.33 Released

tan

(PHP 4, PHP 5)

tanTangent

Descrierea

float tan ( float $arg )

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

Parametri

arg

The argument to process in radians

Valorile întoarse

The tangent of arg

Exemple

Example #1 tan() example

<?php

echo tan(M_PI_4); // 1

?>

Vedeți de asemenea

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User Contributed Notes 1 note

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4
georgedot at gmail dot com
5 years ago
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));
}
?>
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