PHP
downloads | documentation | faq | getting help | mailing lists | reporting bugs | php.net sites | links | conferences | my php.net

search for in the

cosh> <ceil
Last updated: Fri, 18 Jul 2008

view this page in

cos

(PHP 4, PHP 5)

cos — Coseno

Descrizione

float cos ( float $arg )

Restituisce il coseno di arg . Il parametro arg deve essere espresso in radianti.

Example #1 Esempio di cos()

<?php 
 
echo cos(M_PI); // -1 
 
?>

Vedere anche acos(), sin(), tan() e deg2rad().



add a note add a note User Contributed Notes
cos
joescuriosityshoppe at gmail dot com
13-Oct-2006 02:55
Find the side of a triangle using two sides and an angle:
<?
$a = "10"; // length of side a
$b = "15"; // length of side b
$angle = "45";  // angle opposite side c

$c = (sqrt(pow($a, 2) + pow($b, 2) - $a * $b * cos(deg2rad($angle)) * 2));

// side c = 10.613894770933
?>
felipensp at gmail dot com
12-Mar-2006 05:29
Convert degree to radianus, radianus to cos.

<?php

   
// Degree
   
$degree = 360;

   
// Convertion
   
print cos(deg2rad($degree));

?>

cosh> <ceil
Last updated: Fri, 18 Jul 2008
 
 
show source | credits | stats | sitemap | contact | advertising | mirror sites