tan

(PHP 4, PHP 5)

tan — Tangent

Açıklama

float tan ( float $arg )

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

Değiştirgeler

arg: The argument to process in radians

Dönen Değerler

The tangent of arg

Örnekler

Örnek 1 tan() example


<?php

echo tan(M_PI_4); // 1

?>

Ayrıca Bakınız

atan() - Arc tangent
atan2() - Arc tangent of two variables
sin() - Sine
cos() - Cosine
tanh() - Hyperbolic tangent
deg2rad() - Converts the number in degrees to the radian equivalent

add a note User Contributed Notes tan

georgedot at gmail dot com 10-Sep-2009 07:50


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 09-Apr-2006 11:26


To find cotangent you can use

  tan (M_PI/2 - $alfa)

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