(PHP 3, PHP 4 , PHP 5)
sin() returns the sine of the arg parameter. The arg parameter is in radians.
Example 1. sin() example
<?php // Precision depends on your precision directive echo sin(deg2rad(60)); // 0.866025403 ... echo sin(60); // -0.304810621 ... ?>
See also: asin(), cos(), tan(), and deg2rad().
