cos

Cosine

Description

float cos(float $num)

cos returns the cosine of the num parameter. The num parameter is in radians.

Parameters

num

An angle in radians

Return Values

The cosine of num

Examples

Example #1 cos example

<?php

echo cos(M_PI); // -1

?>

See Also

  • acos
  • sin
  • tan
  • deg2rad