1 . 如图,正方体
的棱长为1,
分别为
上的动点,且
,则( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/015d5513-0d41-4c61-9fef-8fa70f5501de.png?resizew=172)
![](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/3da3315c6d0da6a092188a8de1823584.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/276ff5d6630c81667576db93c882fe42.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/015d5513-0d41-4c61-9fef-8fa70f5501de.png?resizew=172)
A.直线![]() ![]() | B.二面角![]() |
C.直线![]() ![]() ![]() | D.三棱锥![]() |
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2 . 如图,
是圆的直径,
垂直于圆所在的平面,
是圆上一点.
![](https://img.xkw.com/dksih/QBM/2021/11/17/2858989793189888/2894330921934848/STEM/4bb04f24-126a-40e7-9bdf-1e19d6fbf2f4.png?resizew=196)
(1)求证:平面
平面![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
(2)若
,求二面角
的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://img.xkw.com/dksih/QBM/2021/11/17/2858989793189888/2894330921934848/STEM/4bb04f24-126a-40e7-9bdf-1e19d6fbf2f4.png?resizew=196)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d077f6da8b2c00b152d4679aa2ed7f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7299971f08868fb27566694a9805b9c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5a2fd95dfda3f70bc2d9fcd8380bf99.png)
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3 . 在立体几何探究课上,老师给每个小组分发了一个正四面体的实物模型,同学们在探究的过程中得到了一些有趣的结论.已知直线
平面
,直线
平面
,F是棱BC上一动点,现有下列四个结论:
①若M,N分别为棱AC,BD的中点,则直线
平面
;
②在棱BC上存在点F,使AF⊥平面
;
③当F为棱BC的中点时,平面
平面
;
④平面
与平面BCD所成锐二面角的正切值为
.
其中所有正确结论的编号是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/26/bf1a5652-1840-4be2-afa1-07146d035808.png?resizew=161)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a5edfe97aeab0cf16b40fa9d2e15f9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08f8b463fcecf0a757f386db56e074d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
①若M,N分别为棱AC,BD的中点,则直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7592c4f01c8e06c7ee90df5b9413a9f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
②在棱BC上存在点F,使AF⊥平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
③当F为棱BC的中点时,平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d62d30d732c3c6ee3f0dd66d7059356.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
④平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
其中所有正确结论的编号是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/26/bf1a5652-1840-4be2-afa1-07146d035808.png?resizew=161)
A.①② | B.①③ | C.②④ | D.③④ |
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2021-11-28更新
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3卷引用:云南省十五所名校2022届高三11月联考数学(理)试题
名校
解题方法
4 . 正四面体P-ABC中,平面PAB与平面ABC所成角余弦值为________ .
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5 . 如图,在正方形
中,
是
上的点,现在沿
把这个正方形折成一个四面体,使
三点重合,重合后的点记为
,则下列说法正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/31/7c67badd-e908-4090-b0cb-373810d90400.png?resizew=375)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2ac787c642466044d50f89d5dac41da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d70de1ffdd9aa376b09bbcfa12644a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d64cdb4dbb052388d448ac4d0a1ba388.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c392add5d9dbcf1975fb2096f28abff8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a734f37ee72eeb46d2e5e07b2522144.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/31/7c67badd-e908-4090-b0cb-373810d90400.png?resizew=375)
A.![]() ![]() | B.![]() ![]() |
C.![]() | D.二面角![]() ![]() |
您最近一年使用:0次
2021-10-14更新
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3卷引用:云南省玉溪第一中学2021-2022学年高二上学期第一次月考数学(理)试题
2021高二上·江苏·专题练习
解题方法
6 . 如图,在四棱锥
中,四边形
为矩形,
平面
,
,
与平面
所成角为
,
为
上一点且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/16/8dbc6ba3-e87a-41d3-b24c-4d3c08327ed3.png?resizew=190)
(1)证明:
;
(2)设平面
与平面
的交线为
,在
上取点
使
,
为线段
上一动点,求平面
与平面
所成二面角的余弦值的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1b49f64e0065edad868b25e9fcada3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5e84a62b385350e02a534046d6acf03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b86c22b670a8e9f3896f9e8883fbbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6be9f0a4775f2f15b4c9d412b52ede88.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/16/8dbc6ba3-e87a-41d3-b24c-4d3c08327ed3.png?resizew=190)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a51584d41544d9c0fb00f5f14d4c7cad.png)
(2)设平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/923f76f123e776b7ace737fe8e298089.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c8ffe24cf9f327aeb241225ab15ab1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7aebaf06bb1c96aecf49603c6a6bfcea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/218054144a13435580cd132b9459546c.png)
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7 . 如图,在四棱锥
中,
底面
,
,
,
是
的中点.
![](https://img.xkw.com/dksih/QBM/2021/5/13/2720233920348160/2805898438156288/STEM/3b97454daa77496dbea9929de86b55e2.png?resizew=183)
(1)证明
平面
;
(2)求二面角
的正切值.
![](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/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35cef70b864b5e128a0828e304e3a4b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ace900749d0861aa51fcc6d72c51f82c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://img.xkw.com/dksih/QBM/2021/5/13/2720233920348160/2805898438156288/STEM/3b97454daa77496dbea9929de86b55e2.png?resizew=183)
(1)证明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1b49f64e0065edad868b25e9fcada3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c09afc70f448545336304333d5b5658b.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e867e5c7ef4da37d8985ce82022060e.png)
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8 . 如图,在四棱锥
中,底面
是边长为2的正方形,
为等边三角形,平面
平面
,点
在线段
上,
,
交于点
,则下列结论正确的是( )
![](https://img.xkw.com/dksih/QBM/2021/6/24/2749649983381504/2784070682738688/STEM/7535fcba6c324256964504a39fbb7dd3.png?resizew=234)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55a675310c8ba418e5a59beb7317e21e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93edc7bb513f40a89173121c8570cd65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://img.xkw.com/dksih/QBM/2021/6/24/2749649983381504/2784070682738688/STEM/7535fcba6c324256964504a39fbb7dd3.png?resizew=234)
A.若![]() ![]() ![]() ![]() |
B.若![]() ![]() ![]() ![]() |
C.锐二面角![]() ![]() |
D.若![]() ![]() ![]() ![]() |
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2021-08-11更新
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5卷引用:云南省大理白族自治州民族中学2023-2024学年高二上学期10月月考数学试题
云南省大理白族自治州民族中学2023-2024学年高二上学期10月月考数学试题江苏省南京市六校联合体2020-2021学年高二下学期期末数学试题(已下线)1.4.2 用空间向量研究距离、夹角问题(同步练习)-【一堂好课】2021-2022学年高二数学上学期同步精品课堂(人教A版2019选择性必修第一册) 湖南省邵阳市武冈市第二中学2021-2022学年高二上学期入学考试数学试题陕西省西安南开高级中学2023-2024学年高二上学期9月第一次质量检测数学试题
9 . 如图,在正三棱柱
中,
,
,设
、
分别是
、
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/13/011c1b72-5dfe-4047-a08f-e225a397a758.png?resizew=180)
(1)求证:
平面
;
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/814f71051bf6e188fa85b25bab298d61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6e3dfcd8aff269dd5aba398816490c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c0a9bf1acb51ab59993b19f8e6a29e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/13/011c1b72-5dfe-4047-a08f-e225a397a758.png?resizew=180)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dae3b545b9cf646d07dd2f5d01ac0428.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10fc7991ea17d54ff5f4445ac5699463.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6006c492019a4f37e68c7b0963d61d8.png)
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名校
10 . 如图甲,四边形
是边长为2的正方形,点E是
的中点.现将正方形
沿
与
折起,使点C与点D重合(记为点P),得到如图乙的四面体
.
![](https://img.xkw.com/dksih/QBM/2021/1/20/2640326911442944/2642342921109504/STEM/e8bcb1a4963a471ca12ea13b74fe3639.png?resizew=378)
(1)证明:平面
平面
;
(2)求锐二面角
的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4ca19321c6776be24e4be5033b60ed7.png)
![](https://img.xkw.com/dksih/QBM/2021/1/20/2640326911442944/2642342921109504/STEM/e8bcb1a4963a471ca12ea13b74fe3639.png?resizew=378)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a26a7784c7419d8359fb119c8ecc03d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
(2)求锐二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bde9b5f82a926bc5cc035023d98f3bb0.png)
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2021-01-23更新
|
410次组卷
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2卷引用:云南省昆明市第一中学2021届高三第五次复习检测数学(理)试题