名校
解题方法
1 . 在正方体
中,
分别是
的中点,下列说法正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/13/6211742e-c82c-4d9e-9093-950a388fbdfb.png?resizew=173)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/238aafef2a6748f15278acb0475ee72b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/13/6211742e-c82c-4d9e-9093-950a388fbdfb.png?resizew=173)
A.四边形![]() |
B.直线![]() ![]() ![]() |
C.直线![]() ![]() ![]() |
D.平面![]() ![]() ![]() |
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2022-11-06更新
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938次组卷
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5卷引用:黑龙江省哈尔滨师范大学附属中学2022-2023学年高二上学期期中考试数学试题
黑龙江省哈尔滨师范大学附属中学2022-2023学年高二上学期期中考试数学试题黑龙江省伊春市铁力市马永顺中学2022-2023学年高二上学期期末数学试题浙江省温州新力量联盟2022-2023学年高二上学期期中联考数学试题(已下线)第33讲二面角的几何求法(已下线)专题8.17 立体几何初步全章综合测试卷(基础篇)-2022-2023学年高一数学举一反三系列(人教A版2019必修第二册)
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2 . 在平行四边形
中,
,沿
将
折起,使二面角
的大小为
,设点
在平面
上的射影为点
.
![](https://img.xkw.com/dksih/QBM/2022/10/25/3095493252677632/3096158509572096/STEM/1d5b119118a34778b6b8d06a181794f7.png?resizew=417)
(1)当
为何值时,三棱锥
的体积最大?最大值为多少?
(2)当
时,求
的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8679764b2abafd810da5e7bde240dcdf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/661ff55b5ebbadfb600989af3cfce2fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/282d4a8c3476b2b81e3fd73898e64539.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7abd284f76d9f5769bc189508ce2572b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://img.xkw.com/dksih/QBM/2022/10/25/3095493252677632/3096158509572096/STEM/1d5b119118a34778b6b8d06a181794f7.png?resizew=417)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb01ad3508483c8929d5bf3fb8d5fc2c.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b5f215a42c4b7078d8d65923eb9980e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
您最近一年使用:0次
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3 . 在正方体ABCD-A1B1C1D1中,下列结论正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/20/8b990916-f9e6-4562-b563-f23c7e2c0815.png?resizew=211)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/20/8b990916-f9e6-4562-b563-f23c7e2c0815.png?resizew=211)
A.直线BD与A1D 所成的角为45° |
B.异面直线BD与AD1所成的角为60° |
C.二面角A-B1C-C1的正弦值为![]() |
D.二面角A-B1C-C1的正弦值为![]() |
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2022-10-18更新
|
682次组卷
|
8卷引用:黑龙江省哈尔滨德强学校2022-2023学年高二(宏志班)上学期期中考试数学试题(B卷)
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4 . 棱长为4的正方体
中,E,F分别为棱
,
的中点,若
,则下列说法中正确的有( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72545bef56c4e32d1b76489bd32c3842.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e17230625e72d3a9c6d72ff61019ff61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f83044285fd2454d070d0ba68c2bdab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf7265a048c572531048c11147b04f4e.png)
A.三棱锥![]() |
B.二面角![]() ![]() |
C.当![]() ![]() |
D.当![]() ![]() |
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2022-10-17更新
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4卷引用:黑龙江省哈尔滨德强学校2022-2023学年高二(清北AB班)上学期期中考试数学试题(A卷)
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5 . 如图,正方体
的棱长为
,点
为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/14/7d23bbb7-f319-4328-a51c-f180968314ee.png?resizew=178)
(1)求点
到平面
的距离;
(2)求二面角
的余弦值
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/14/7d23bbb7-f319-4328-a51c-f180968314ee.png?resizew=178)
(1)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2331bccb6ebf5b9fd639df994f575a9.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cb2a344518d4d3a9b443129a869ab44.png)
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解题方法
6 . 在三棱锥
中,
平面
,则二面角
的正切值为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5f1897a7e856b42f8cee0f286ad913d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46f23a8905a9702042afe11ba689507d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47d294d69caac577339f11f477b2047e.png)
您最近一年使用:0次
2022-04-07更新
|
202次组卷
|
3卷引用:黑龙江省鸡西市密山市第四中学2023-2024学年高二上学期8月月考数学试题
7 . 在四棱锥
中,
底面ABCD,E为AC的中点,
,
.
![](https://img.xkw.com/dksih/QBM/2022/3/8/2931920475340800/2933766944006144/STEM/205dab24-0bad-4da7-a397-5b37a32ffd61.png?resizew=165)
(1)求证:
;
(2)若
,
,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3b10835116b9b777a666b438c907b49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/829018a6ca0aff95d89e3f7cd943274e.png)
![](https://img.xkw.com/dksih/QBM/2022/3/8/2931920475340800/2933766944006144/STEM/205dab24-0bad-4da7-a397-5b37a32ffd61.png?resizew=165)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d5ee2d6fcbcad17b69997ef0741d2d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1134c8e3440abb6cd385af2c169037fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d730ae4307db56b47849c3a19dedfb3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cc03a6f8df806225fd34627c9488270.png)
您最近一年使用:0次
2022-03-11更新
|
280次组卷
|
3卷引用:黑龙江省鸡西市密山市第四中学2023-2024学年高二上学期11月月考数学试题
名校
解题方法
8 . 如图,在四棱锥
中,
,
,
,
为边
的中点,异面直线
与
所成的角为
.
![](https://img.xkw.com/dksih/QBM/2021/9/18/2810593511522304/2815984778870784/STEM/0b0c9b1b-1633-4043-bc3f-8b753f9cb5ca.png?resizew=266)
(1)在直线
上找一点
,使得直线
平面
,并求
的值;
(2)若直线
到平面
的距离为
,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f571396be1aa4a8914a66f7d7abd6381.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6378fc7805bd0729f6a00a8bd2662d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3384e2b63e4be03a8762b819499e669b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://img.xkw.com/dksih/QBM/2021/9/18/2810593511522304/2815984778870784/STEM/0b0c9b1b-1633-4043-bc3f-8b753f9cb5ca.png?resizew=266)
(1)在直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e0684e0b09b04661c602437982c0397.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64eb31601464364be2baf4aa87404bcd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f32f82942e12701f6ba4b87d02291b1.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64eb31601464364be2baf4aa87404bcd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9868f77d5ab5073b6145f1c6d272122e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/452c39e9c252d158710c86a3263c9fe7.png)
您最近一年使用:0次
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9 . 在正n棱锥中,相邻两侧面所成的二面角的取值范围是( ).
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2021-09-25更新
|
102次组卷
|
2卷引用:黑龙江省哈尔滨市第三中学2021-2022学年高二上学期10月月考数学试题
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10 . 如图,在长方体
中,点
为
的中点,且
,
.
![](https://img.xkw.com/dksih/QBM/2021/7/11/2761962810302464/2776594950348800/STEM/f78ce18e5f93492f8cafa2d28ab8bd17.png?resizew=222)
(1)求证:
平面
;
(2)求二面角
的正切值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22adbc0da438220f9cace11b629d799b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f121eabff3c62c1a196d9ca5f6f83f0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e55a2310cbba5e050488cd9296eb195d.png)
![](https://img.xkw.com/dksih/QBM/2021/7/11/2761962810302464/2776594950348800/STEM/f78ce18e5f93492f8cafa2d28ab8bd17.png?resizew=222)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7542b49ab149f2be8ba6b48392bef1f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46e2da608b66c9aee03e2503388ba4fd.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42f4096ff62b4f29932cd8c6eef661a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e45bcd8f6ede8cc2513ad41402f40086.png)
您最近一年使用:0次
2021-08-01更新
|
408次组卷
|
5卷引用:黑龙江省鹤岗市第一中学2022-2023学年高二上学期开学考试数学试题