<html><body>echo(cos(3) . "<br>");echo(cos(-3) . "<br>");echo(cos(0) . "<br>");echo(cos(M_PI) . "<br>");echo(cos(2*M_PI));</body><!-- Mirrored from www.w3schools.com/php/phptryit.asp?filename=tryphp_func_math_cos by HTTrack Website Copier/3.x [XR&CO'2014], Mon, 27 Jan 2020 02:51:03 GMT --></html>