W3School TIY Editor
W3School 在线教程
改变方向
暗黑模式
<!DOCTYPE html> <html> <body> <?php echo(asin(0.64) . "<br>"); echo(asin(-0.4) . "<br>"); echo(asin(0) . "<br>"); echo(asin(-1) . "<br>"); echo(asin(1) . "<br>"); echo(asin(2)); ?> </body> </html>