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<!DOCTYPE html> <html> <body> <?php // Invalid calculation will return a NaN value $x = acos(8); var_dump($x); ?> </body> <!-- Mirrored from www.w3schools.com/php/phptryit.asp?filename=tryphp_numbers_nan by HTTrack Website Copier/3.x [XR&CO'2014], Tue, 07 Jun 2022 19:58:24 GMT --> </html>
float(NAN)