1 . 如图,在棱长为2的正方体
中,P为
的中点,Q为
上任意一点,E、F为CD上任意两点,且EF的长为1,则下列四个值中为定值的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/394c5d2f55221975503be8aa18022480.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/10/fc131878-46f6-46f4-962d-bc796e155ffa.png?resizew=160)
A.点P到平面QEF的距离 | B.二面角![]() |
C.直线PQ与平面PEF所成的角 | D.三棱锥![]() |
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解题方法
2 . 在直三棱柱
中,
,
,
,延长
至
,使
,连接
,
,
.
(1)求证:平面
平面
;
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb4957406b21df59fdf7fa184752287b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92535536bd3c2761724fd058427f95a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e66ccb8f442161808545bc033b0ef7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b470c4e195cf7a07b7a331ce4b436e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87cdc08e1c4a04a18d5ecea03393e36d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/4/34b73734-938a-47a3-be33-91879d3c7fce.png?resizew=150)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/584a94c9615bda8619222eb2d8bf7284.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d9a8181f7a7fe7f3fac872ce9534f15.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c96669b8b29a56d2a33546aa7af02979.png)
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2023-09-03更新
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595次组卷
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2卷引用:湖南省长沙市名校2024届高三上学期8月第一次质量检测数学试题
名校
3 . 如图所示,四棱锥
中,底面
为矩形,
平面
,
,
,点
是
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/25/27e2bb49-56cf-4035-8d67-71418900b692.png?resizew=163)
(1)证明:
;
(2)求二面角
的大小.
![](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/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f83a04565a8ebaa111894b724b0ba266.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a88c44f558705de3bcefcfc0ece96b8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/25/27e2bb49-56cf-4035-8d67-71418900b692.png?resizew=163)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4486d52b6e410fd7b60428121d96cef.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbeab80976db9b4689b9446cda06196a.png)
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4 . 如图①所示,长方形
中,
,点M是边CD的中点,将
沿AM翻折到
,连结PB,PC,得到图②的四棱锥
.
(1)若棱PB的中点为N,求CN的长;
(2)设
的大小为
,若
,求平面
和平面
夹角余弦值的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8716b5aad93d97ca1c3791b9c717cc0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7f9fba8a4098c1a0515286eb8d616dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fb62dd4766d11cfec3aee092b99e40c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfb216a6b4dfa1280e1e67d172fea409.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/26/6be74261-5155-450a-8e60-6f5c6bd730ff.png?resizew=374)
(1)若棱PB的中点为N,求CN的长;
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/212e8c352c4d9b022a057d7d7fa7dd14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd571fb420cd6b9ecb83989f1d39c38f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c745df4f226027778d5fe45b6501b822.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
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5 . 如图,在三棱台
中,
,
,
,
.
平面
;
(2)若直线
与平面
所成角为
,求平面
和平面
所成角的正切值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/986ba572d8373df48c996f8c8611498c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ed8f7d3d7043d4b1eb98fc5c4e2fcd3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b9d0c688e55286443c9974797fc647f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0402dd5ae3db10281f9f1e11738bcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de19416fa3c38b1b82abf0937573f9fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d052663101ca930843abd98cbd61c19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a28d6477c85c5a4ac410a884e92fbe53.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/926d1308d5db144e31b4d0211c63ef52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/678b28fddb166d90878d24d6e5481080.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
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2023-07-26更新
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3卷引用:湖南省长沙市浏阳市重点校2023-2024学年高一下学期期中联考数学试卷
名校
解题方法
6 . 如图,在边长为4的正方形ABCD中,点E是AB的中点,点F是BC的中点,点P是AD上的动点,将
分别沿DE,DF折起,使A,C两点重合于点G,则下列结论正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/21/95d4dd4e-10e0-4e6c-81ed-d7c1946d7514.png?resizew=373)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9bc485051e6b8f7e5bdbc533da53f83.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/21/95d4dd4e-10e0-4e6c-81ed-d7c1946d7514.png?resizew=373)
A.BG⊥EF |
B.G到平面DEF的距离为![]() |
C.若BG∥面EFP,则二面角D−EF−P的余弦值为![]() |
D.四面体G−DEF外接球表面积为![]() |
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737次组卷
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2卷引用:湖南师范大学附属中学2022-2023学年高一下学期期末数学试题
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7 . 如图1,平面四边形
中,
,
,
,E为
的中点,将
沿对角线
折起,使
,连接
,得到如图2所示的三棱锥
.
(1)证明:平面
平面
;
(2)已知直线
与平面
所成的角为
,求平面
与平面
夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98e486a1aad96167ff62f6fb5136e0bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36c4559d27e3905980d1a4f1856f07de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bf10d92f20501e19d25f6f4159aab89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7aa1162d5481e2441fe5bc0d49a576b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4357d5744046d4d44abb09e1ee35fcb.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/26/8d6286fc-3716-438a-b431-6dfbbd9d7045.png?resizew=373)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d28c625d7ac6878957facc8274d459c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
(2)已知直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15615de1a6df206dbd081251f676578e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7abd284f76d9f5769bc189508ce2572b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9dfaad4c4467e27421876d8f2a4371d2.png)
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8 . 如图,正方体的棱长为3,E为AB的中点,
,动点M在侧面
内运动(含边界),则( )
A.若![]() ![]() ![]() |
B.平面![]() ![]() |
C.平面![]() ![]() ![]() |
D.不存在一条直线l,使得l与正方体![]() |
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2023-05-06更新
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1769次组卷
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4卷引用:湖南省长沙市雅礼中学2023届高三一模数学试题
湖南省长沙市雅礼中学2023届高三一模数学试题吉林省普通高中友好学校第三十六届联合体2022-2023学年高一下学期期中联考数学试题(已下线)模块三 专题3 小题满分挑战练(1)(人教B)(已下线)第三章 空间轨迹问题 专题一 立体几何轨迹常见结论及常见解法 微点1 立体几何轨迹常见结论及常见解法(一)【培优版】
9 . 如图,已知斜四棱柱
,底面
为等腰梯形,
,点
在底面
的射影为
,且
,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/9/6322f190-0547-4fa4-8bac-06ca219903c3.png?resizew=260)
(1)求证:平面
平面
;
(2)若
为线段
上一点,且平面
与平面
夹角的余弦值为
,求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0fff774b4b0087a6f304ce930d359be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c1c788096ba7560ceb6db87763e88ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6f546825da254e8378dc074cc2c8562.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc0a886f1192d450ced9fd875e78425e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/9/6322f190-0547-4fa4-8bac-06ca219903c3.png?resizew=260)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cf9a6db3571fa57bfa2d5e4d44c51b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d9a8181f7a7fe7f3fac872ce9534f15.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cfbc0b5a8fbde804bd8425a4b76d207.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2730b513bd3359c3dfe6567e04f5ef9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3aace91caec728e174daec29a3568ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9399c9a2a31b0e3165aea2d6ccc4f7c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2730b513bd3359c3dfe6567e04f5ef9.png)
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2023-04-07更新
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1630次组卷
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2卷引用:湖南省长沙市长郡中学2024届高三上学期期末适应性考数学试题
名校
10 . 在如图所示试验装置中,两个长方形框架
与
全等,
,
,且它们所在的平面互相垂直,活动弹子
分别在长方形对角线
与
上移动,且
,则下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dde327febef2331a4766a79b433cc02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ab4007a35a23105744177d982caf747.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6af56667f167c0b25fbfbfd619363e9.png)
A.![]() |
B.![]() ![]() |
C.当![]() ![]() ![]() ![]() |
D.![]() |
您最近一年使用:0次
2023-03-03更新
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3卷引用:湖南省长沙市雅礼中学2023届高三下学期月考(七)数学试题