解题方法
1 . 如图,直四棱柱ABCD﹣A1B1C1D1的底面是菱形,AA1=4,AB=2,∠BAD=60°,E、M、N分别是BC、BB1、A1D的中点.
![](https://img.xkw.com/dksih/QBM/2022/2/18/2919063407206400/2949075023831040/STEM/6fcf991c-7803-41a2-97c6-c7a9167c0cd9.png?resizew=165)
(1)证明:MN∥平面C1DE;
(2)求直线AM与平面C1DE所成角的正弦值.
![](https://img.xkw.com/dksih/QBM/2022/2/18/2919063407206400/2949075023831040/STEM/6fcf991c-7803-41a2-97c6-c7a9167c0cd9.png?resizew=165)
(1)证明:MN∥平面C1DE;
(2)求直线AM与平面C1DE所成角的正弦值.
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2022-04-02更新
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2卷引用:广东省化州市第三中学2021-2022学年高二上学期期中数学试题
名校
2 . 如图所示,在四棱锥
中,底面
为直角梯形,
,
,平面
底面
,
为
的中点,
为
的中点,
,
,
.
;
(2)求二面角
的余弦值.
![](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/f571396be1aa4a8914a66f7d7abd6381.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a0e5697eca3f5205cb7b343648240bf.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/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b099921916da2b2e4a63f273b90be16e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5729dd997ea7e8cb4cef8b7165b36e00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18120a244d3a1f9c1688bf53eb2ad775.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d84733f9dc908ceb11459cc2aed580ab.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37d02d4063639138f0cf61426fac69f8.png)
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2021-12-22更新
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5卷引用:广东省广州市增城区增城中学2021-2022学年高二上学期第二阶段测试数学试题
广东省广州市增城区增城中学2021-2022学年高二上学期第二阶段测试数学试题广东省揭阳市揭东区第三中学2022-2023学年高二上学期第一次质量检测数学试题河南省濮阳市2018届高三第二次模拟考试数学(理)试题(已下线)人教B版2019选择性必修第一册综合测试(能力提升)-2020-2021学年高二数学单元测试定心卷(人教B版2019选择性必修第一册)甘肃省天水市第一中学2023-2024学年高一下学期第二次段中检测(6月)数学试题
解题方法
3 . 如图,四棱锥
的底面是矩形,
底面
,
为
的中点,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/11/3352a098-3a28-4dcc-9aeb-3952ce222f69.png?resizew=144)
(1)证明:平面
平面
;
(2)若
,求二面角
的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.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/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/186e5e7efe51fd25b9e38dc0fa23de9d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/11/3352a098-3a28-4dcc-9aeb-3952ce222f69.png?resizew=144)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/392469b357b12b998528499929366c02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f571a1aac46c6d0cf440c0ec2846bf9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffddeafce03aae663bc823e2d5127c61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7b312de408dda638ca3e9c687549d46.png)
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2021-11-25更新
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3卷引用:广东省佛山市南海区西樵高级中学2021-2022学年高二上学期第二次大测数学试题
广东省佛山市南海区西樵高级中学2021-2022学年高二上学期第二次大测数学试题重庆市缙云教育联盟2022届高三上学期11月质量检测数学试题(已下线)考点36 利用空间向量法解决立体几何的综合问题【理】-备战2022年高考数学典型试题解读与变式
名校
解题方法
4 . 如图,在四棱锥
中,平面
平面
,
为等边三角形,四边形
为矩形,
为
的中点.
![](https://img.xkw.com/dksih/QBM/2022/1/15/2895071987507200/2896682430193664/STEM/935bf137-d54b-4a81-9344-ebc7d729d024.png?resizew=163)
(1)证明:平面
平面
;
(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/4cf9a6db3571fa57bfa2d5e4d44c51b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2205cffebf8c4d5f81d15ed7b85c8936.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.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/2022/1/15/2895071987507200/2896682430193664/STEM/935bf137-d54b-4a81-9344-ebc7d729d024.png?resizew=163)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d28c625d7ac6878957facc8274d459c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c4e4a162f12d12a082b8d8fdd1aeab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c76abad7103e74e5613a802475f1c0f9.png)
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5 . 已知椭圆C的中心为坐标原点,且以直线
(m∈R)所过的定点为一个焦点,过右焦点F2且与x轴垂直的直线被椭圆C截得的线段长为2.
(1)求椭圆C的标准方程;.
(1)设点A,B分别是椭圆C的左、右顶点,P,Q分别是椭圆C和圆O∶
上的动点(P,Q位于y轴两侧),且直线PQ与x轴平行,直线AP,BP分别与y轴交于不同的两点M,N,求证∶QM与QN所在的直线互相垂直.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0c2c59bbda1345612c6f7632355ea63.png)
(1)求椭圆C的标准方程;.
(1)设点A,B分别是椭圆C的左、右顶点,P,Q分别是椭圆C和圆O∶
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d61985901c2bc698d72ac88f4e1eb65.png)
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2021-09-08更新
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4卷引用:广东省深圳外国语学校2022届高三上学期第一次月考数学试题
广东省深圳外国语学校2022届高三上学期第一次月考数学试题广东省广州市重点高中2022届高三上学期第一次月考数学试题安徽省十校联盟2021-2022学年高三上学期开学摸底考试文科数学试题(已下线)第十一章 圆锥曲线专练14—椭圆大题(证明题)-2022届高三数学一轮复习
名校
解题方法
6 . 在边长为2的正方形ABCD所在的平面与半圆弧
所在的平面垂直,M是弧CD上异于C,D的点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/27/6e5ff79b-6998-40d6-b780-b9267ae2d7fc.png?resizew=194)
(1)证明:平面
平面
;
(2)当三棱锥
体积最大时,求直线MD与面MAB所成夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/27/6e5ff79b-6998-40d6-b780-b9267ae2d7fc.png?resizew=194)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb23a04ac9df27fb987126e7ba0f6c6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17c5ef850e256c98ca4f033999e61311.png)
(2)当三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5d90f940f5693b22ddf2e7c761887d8.png)
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2021-11-15更新
|
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2卷引用:广东省佛山市南海区九江中学2021-2022学年高二上学期校内一检数学试题
名校
解题方法
7 . 1.如图,在底面为直角梯形的四棱锥
中,
,
,
平面
,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/28/0cd4d610-74ae-469f-8cd8-bdef6855f467.png?resizew=268)
(1)求证:
平面
;
(2)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/45acdbac251ca6b76a166c1242e71df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00bab2c27eac56fffa4cd7dbe1dcdf1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d27bd71d79cb19eb554175e4ef0867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/077c956ac0eb05cf120e14f17413dfa2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07160f14b3b453bebb64cb2bf96dc85a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/28/0cd4d610-74ae-469f-8cd8-bdef6855f467.png?resizew=268)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a5928c98b341b16d4b5a5b931d2929d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a65bf87f74420270138ed73a2d38ca48.png)
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2021-12-04更新
|
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3卷引用:广东省佛山市南海区南海执信中学2021-2022学年高二上学期第二次段测数学试题
名校
8 . 如图,四棱锥
的底面ABCD为矩形,
,
,平面
平面ABCD,E是AB的中点.
![](https://img.xkw.com/dksih/QBM/2021/11/12/2849805009338368/2851292487589888/STEM/cf33b241-3f4d-4c6d-ab8a-836ef6136799.png?resizew=252)
(1)证明:
平面PAC;
(2)若
,且二面角
余弦值为
,求直线PA与平面PBD所成的角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080ca48cd27d4bf9d9ef084b558fc17a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0402dd5ae3db10281f9f1e11738bcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d077f6da8b2c00b152d4679aa2ed7f7.png)
![](https://img.xkw.com/dksih/QBM/2021/11/12/2849805009338368/2851292487589888/STEM/cf33b241-3f4d-4c6d-ab8a-836ef6136799.png?resizew=252)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8d2d217e9bcd059908f117dfc4d4259.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cb96e0331eebe80ed1ff610faf531fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad6a0cee8226e82cc57916e10d533369.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
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2021-11-14更新
|
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4卷引用:广东省广州市广州大学附属中学、铁一中学、广州外国语学校2021-2022学年高二上学期期中三校联考数学试题
广东省广州市广州大学附属中学、铁一中学、广州外国语学校2021-2022学年高二上学期期中三校联考数学试题广东省佛山市南海区桂华中学2021-2022学年高二上学期第二次阶段测试数学试题河南省安阳市第三十九中学2022-2023学年高二上学期第二次加密考试数学试题(已下线)高二上学期期中【全真模拟卷03】(测试范围:选修一全部内容)-2022-2023学年高二数学考试满分全攻略(人教A版2019选修第一册)
名校
解题方法
9 . 如图所示,矩形ABCD所在平面与直角梯形ABEF所在平面垂直,点G是边AB上一点,AB=AF=4,AD=2,AG=BE=1,AF⊥AB,BE⊥AB.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/2/2373c983-e8bc-4381-b6f9-b62621c95795.png?resizew=220)
(1)求证:平面DFG
平面ACF;
(2)求平面DFG与平面CEF所成锐二面角的余弦值.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/2/2373c983-e8bc-4381-b6f9-b62621c95795.png?resizew=220)
(1)求证:平面DFG
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1633988fd62a652de726ee92a917b52d.png)
(2)求平面DFG与平面CEF所成锐二面角的余弦值.
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2021-12-04更新
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3卷引用:广东省普通高中2022届高三上学期10月阶段性质量检测数学试题
10 . 如图,已知四边形
为正方形,
平面
,
,
,
,
为线段
上的动点,
为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/19/718ca2e9-5839-47d0-9e8c-973fc25a289e.png?resizew=142)
(1)求证:
;
(2)求
与平面
所成角的正弦值的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2459f645241b285a182ff59dd78bfea0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/147e7c8ba0bbb540a712f6eb2ed6d22e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81681f4f098511de0da54271f2b42a23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/527c1423edc277d8d51b30cb913fdb46.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8700b7f610cead2312e23262b97a4a30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/19/718ca2e9-5839-47d0-9e8c-973fc25a289e.png?resizew=142)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4d58912298d9349e6906f84ad347908.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a424b50eaeafa6f302ffd95476cb86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed4cba9d2412e4a28f8740bddd5738d4.png)
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