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tanh> <srand
[edit] Last updated: Fri, 25 May 2012

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tan

(PHP 4, PHP 5)

tanTangente

Description

float tan ( float $arg )

Retourne la tangente de arg (arg en radians).

Liste de paramètres

arg

L'argument à traiter, en radians

Valeurs de retour

La tangente de arg

Exemples

Exemple #1 Exemple avec tan()

<?php

echo tan(M_PI_4); // 1

?>

Voir aussi



add a note add a note User Contributed Notes tan
georgedot at gmail dot com 10-Sep-2009 01:50
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 05:26
To find cotangent you can use
  tan (M_PI/2 - $alfa)

 
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