PHP 5.5.17 is available

cos

(PHP 4, PHP 5)

cosCosine

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

?>

See Also

  • acos() - Arc cosine
  • sin() - Sine
  • tan() - تانژانت
  • deg2rad() - Converts the number in degrees to the radian equivalent

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User Contributed Notes 2 notes

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1
felipensp at gmail dot com
8 years ago
Convert degree to radianus, radianus to cos.

<?php

   
// Degree
   
$degree = 360;

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

?>
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-7
shrinivasmani at gmail dot com
11 months ago
Convert degree to radianus

<?php

   
// Degree
   
$degree = 360;

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

?>
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