2023·全国·模拟预测
名校
1 . 如图,正方体
的棱长为3,点P是平面
内的动点,M,N分别为
,
的中点,若直线BP与MN所成的角为
,且
,则动点P的轨迹所围成的图形的面积为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13cfdc6224181d44e63aab43ddaf07ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f66fb71b75b63594ebeeeebd1963eed5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7f6f93171329d508d491143b9d71f7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/750303cc97d19b55b5acbc9f162909c2.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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