(PHP 4, PHP 5, PHP 7, PHP 8)
sin — Sine
sin() returns the sine of the num
parameter. The num parameter is in radians.
numA value in radians
The sine of num
Example #1 sin() example
<?php
// Precision depends on your precision directive
echo sin(deg2rad(60)); // 0.866025403 ...
echo sin(60); // -0.304810621 ...
?>