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<!DOCTYPE html> <html> <body> <?php echo(tan(M_PI_4) . "<br>"); echo(tan(0.50) . "<br>"); echo(tan(-0.50) . "<br>"); echo(tan(5) . "<br>"); echo(tan(10) . "<br>"); echo(tan(-5) . "<br>"); echo(tan(-10)); ?> </body> </html>
1
0.54630248984379
-0.54630248984379
-3.3805150062466
0.64836082745909
3.3805150062466
-0.64836082745909