名校
解题方法
1 . 如图,正方体
的棱长为1,E、F分别为棱AD、BC的中点,则平面
与底面ABCD所成的二面角的余弦值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/354ee41dcce9ed93fb835cc6364e8490.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2020-11-07更新
|
983次组卷
|
8卷引用:北京市顺义区2019-2020学年高一下学期期末质量监测数学试题
名校
解题方法
2 . 如图,在四棱锥
中,
底面
,底面
是边长为1的正方形,
,则侧面
与底面
所成的二面角的大小是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/6/1385a33e-edc4-409b-aa8b-2bddf1ea9d94.png?resizew=130)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8c762086e5ba072fc253a26a7ad8b9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcc532cfe64300cb3da9e04a307c957a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/6/1385a33e-edc4-409b-aa8b-2bddf1ea9d94.png?resizew=130)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2020-10-24更新
|
769次组卷
|
3卷引用:北京市朝阳区2019~2020学年度高一下学期期末质量检测数学试题
3 . 如图,棱锥
中,
平面
,
,
是
中点,下列结论错误 的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/5/a8ac5ebf-bcc6-4f3e-aa86-dbdf06572252.png?resizew=178)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6a94d59dee2d5a8f0425b64b2083825.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/deae57d07054a06b33749895b1540b13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/554d7c1fea9a9dead1e365ff26ca03db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e5204be59a368174866dd399aaa1978.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/5/a8ac5ebf-bcc6-4f3e-aa86-dbdf06572252.png?resizew=178)
A.平面![]() ![]() | B.![]() |
C.![]() | D.二面角![]() ![]() |
您最近一年使用:0次
名校
解题方法
4 . 如图,
是
的直径,
垂直于
所在平面,
是圆周上不同于
两点的任意一点,且
,
,则二面角
的大小为
![](https://img.xkw.com/dksih/QBM/2017/5/3/1679119476301824/1737790118789120/STEM/099fb13b-b94d-423d-8427-455571919cb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5d66fe80fd5293abc5f446aae36446f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5a2fd95dfda3f70bc2d9fcd8380bf99.png)
![](https://img.xkw.com/dksih/QBM/2017/5/3/1679119476301824/1737790118789120/STEM/099fb13b-b94d-423d-8427-455571919cb8.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2017-07-25更新
|
350次组卷
|
4卷引用:北京市中国人民大学附属中学2021届高三1月期末模拟统一练习数学试题