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源代码
运行
保存
"); echo(asin(-0.4) . "
"); echo(asin(0) . "
"); echo(asin(-1) . "
"); echo(asin(1) . "
"); echo(asin(2)); ?>
运行结果
0.69449826562656
-0.41151684606749
0
-1.5707963267949
1.5707963267949
NAN