cos
(PHP 4, PHP 5)
cos — Cosine
說明
float cos
( float $arg
)
cos() returns the cosine of the arg parameter. The arg parameter is in radians.
參數
- arg
-
An angle in radians
Return值
The cosine of arg
範例
Example#1 cos() example
<?php
echo cos(M_PI); // -1
?>