ceil
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
?>
cos
(PHP 4, PHP 5)
cos — Cosine
Description
float cos
( float $arg
)
cos() returns the cosine of the arg parameter. The arg parameter is in radians.
Parameters
- arg
-
An angle in radians
Return Values
The cosine of arg
Examples
Example #1 cos() example
<?php
echo cos(M_PI); // -1
?>
add a note
User Contributed Notescos
joescuriosityshoppe at gmail dot com
13-Oct-2006 03:55
13-Oct-2006 03:55
felipensp at gmail dot com
12-Mar-2006 06:29
12-Mar-2006 06:29
Convert degree to radianus, radianus to cos.
<?php
// Degree
$degree = 360;
// Convertion
print cos(deg2rad($degree));
?>
