Get your own PHP server Result Size: 625 x 565
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<!DOCTYPE html>
<html>
<body>
<?php
echo(cos(3) . "<br>");
echo(cos(-3) . "<br>");
echo(cos(0) . "<br>");
echo(cos(M_PI) . "<br>");
echo(cos(2*M_PI));
?>
</body>
</html>
-0.98999249660045
-0.98999249660045
1
-1
1