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<!DOCTYPE html> <html> <body> <?php echo(atanh(M_PI_4) . "<br>"); echo(atanh(0.50) . "<br>"); echo(atanh(-0.50) . "<br>"); echo(atanh(1) . "<br>"); echo(atanh(-1)); ?> </body> <!-- Mirrored from www.w3schools.com/php/phptryit.asp?filename=tryphp_func_math_atanh by HTTrack Website Copier/3.x [XR&CO'2014], Mon, 27 Jan 2020 02:51:03 GMT --> </html>
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