<html><body>echo(atan2(0.50,0.50) . "<br>");echo(atan2(-0.50,-0.50) . "<br>");echo(atan2(5,5) . "<br>");echo(atan2(10,20) . "<br>");echo(atan2(-5,-5) . "<br>");echo(atan2(-10,10));</body><!-- Mirrored from www.w3schools.com/php/phptryit.asp?filename=tryphp_func_math_atan2 by HTTrack Website Copier/3.x [XR&CO'2014], Mon, 27 Jan 2020 02:51:03 GMT --></html>