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<!DOCTYPE html> <html> <body> <?php echo(acos(0.64) . "<br>"); echo(acos(-0.4) . "<br>"); echo(acos(0) . "<br>"); echo(acos(-1) . "<br>"); echo(acos(1) . "<br>"); echo(acos(2)); ?> </body> <!-- Mirrored from www.w3schools.com/php/phptryit.asp?filename=tryphp_func_math_acos by HTTrack Website Copier/3.x [XR&CO'2014], Mon, 27 Jan 2020 02:51:03 GMT --> </html>
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