1 . 如图,平行四边形
中,
,
,E为边AB的中点,将
沿
折起,使A到
,得到四棱锥
,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/13/8671c9bb-3593-4096-8791-8aa8452be3b3.png?resizew=261)
(1)求证:
;
(2)求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62142d2d114ffd9f404be533b79e530b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/207be8e34da2b04f5dfe7a69be80d479.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be7527d873655c33ebcd1f2b14a9315c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48304e659b9fac4f0462fb4e5e5f74be.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/13/8671c9bb-3593-4096-8791-8aa8452be3b3.png?resizew=261)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9008d11a11645c15f2ed48cbbceb81fe.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a21897349d3d7c94419692106887153.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/719103f93166bab4828257608e641a9a.png)
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名校
2 . 如图,在三棱锥
中,
平面
,
,
,
,以B为原点,分别以
,
,
的方向为x轴,y轴,z轴的正方向建立空间直角坐标系,设平面PAB和平面PBC的一个法向量分别为
,
,则下列结论中正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/2/22643587-d3c4-4de5-8b96-cb100ab805cf.png?resizew=139)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.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/45acdbac251ca6b76a166c1242e71df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b57fdd2a3642716fcf5100011eb3ec88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f83a04565a8ebaa111894b724b0ba266.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d792a2aa25763e14cc2863be3887000.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305d5f36a9fdbc840161b36563923195.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84b8a2a41a8b50e10d68943e3f0f4e05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/560ee2894ba8c5cee6633430cc8b3b41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36f1a8e551cba7ec9f451749f60e628d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/2/22643587-d3c4-4de5-8b96-cb100ab805cf.png?resizew=139)
A.点P的坐标为![]() | B.![]() |
C.![]() | D.![]() |
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2022-03-07更新
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9卷引用:黑龙江省五校2021-2022学年高二上学期期末联考数学试题
黑龙江省五校2021-2022学年高二上学期期末联考数学试题广东省佛山市顺德区第一中学2022-2023学年高二上学期第一次月考数学试题河南省天一大联考2019-2020学年高二上学期阶段性测试(二)数学(理)试题(已下线)1.4.2 运用立体几何中的向量方法解决垂直问题-2020-2021学年高二数学课时同步练(人教A版选择性必修第一册)天津市河北区2021-2022学年高二上学期期中数学试题(已下线)6.3.1 直线的方向向量与平面的法向量(练习)-2022-2023学年高二数学同步精品课堂(苏教版2019选择性必修第二册)(已下线)第3讲 空间向量及其运算的坐标表示 (2)(已下线)2.4.1 空间直线的方向向量和平面法向量(同步练习)-【素养提升—课时练】2022-2023学年高二数学湘教版选择性必修第二册检测(基础篇) 广东省佛山市顺德区罗定邦中学2023-2024学年高二上学期10月月考数学试题
名校
解题方法
3 . 如图1,已知正方形ABCD的边长为4,E,F分别为AD,BC的中点,将正方形ABCD沿EF折成如图2所示的二面角,点M在线段AB上(含端点)运动,连接AD.
![](https://img.xkw.com/dksih/QBM/2022/2/24/2923382857392128/2926956710281216/STEM/31d6b5b8-73b8-44bf-b127-94be4003f4a3.png?resizew=303)
(1)若M为AB的中点,直线MF与平面ADE交于点O,确定O点位置,求线段OA的长;
(2)若折成二面角的大小为45°,是否存在点M,使得直线DE与平面EMC所成的角为45°,若存在,确定出点M的位置;若不存在,请说明理由.
![](https://img.xkw.com/dksih/QBM/2022/2/24/2923382857392128/2926956710281216/STEM/31d6b5b8-73b8-44bf-b127-94be4003f4a3.png?resizew=303)
(1)若M为AB的中点,直线MF与平面ADE交于点O,确定O点位置,求线段OA的长;
(2)若折成二面角的大小为45°,是否存在点M,使得直线DE与平面EMC所成的角为45°,若存在,确定出点M的位置;若不存在,请说明理由.
您最近一年使用:0次
2022-03-01更新
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1085次组卷
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6卷引用:湖北省荆州市沙市中学2021-2022学年高二上学期期末数学试题
湖北省荆州市沙市中学2021-2022学年高二上学期期末数学试题(已下线)综合测试卷(巅峰版)-【新教材优创】突破满分数学之2022-2023学年高二数学重难点突破+课时训练 (人教A版2019选择性必修第一册)(已下线)解密15 空间向量与立体几何 (分层训练)-【高频考点解密】2022年高考数学二轮复习讲义+分层训练(全国通用)湖北省孝感市安陆市第一高级中学2021-2022学年高二下学期开学考试数学试题湖北省随州市曾都区第一中学2022-2023学年高二上学期11月月考数学试题(已下线)第一章 点线面位置关系 专题三 共点问题 微点2 立体几何共点问题的解法综合训练【培优版】
名校
解题方法
4 . 如图,直三棱柱
中,
,
,
是棱
的中点,
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/98691b60-75a7-46c0-8d55-c543767c5ad0.png?resizew=143)
(1)求异面直线
所成角的余弦值;
(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/2af2626608f61a4cfbb86494bd6df0e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36c4559d27e3905980d1a4f1856f07de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/98691b60-75a7-46c0-8d55-c543767c5ad0.png?resizew=143)
(1)求异面直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48dc31d70d857389d2e4d91cddc59228.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4997d1354f13e6074018ab1aa3927507.png)
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2022-02-27更新
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458次组卷
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3卷引用:江苏省南通市如皋中学2021-2022学年高二上学期期末数学试题
5 . 如图,在直三棱柱
中,
,D,E分别为
的中点.
![](https://img.xkw.com/dksih/QBM/2021/12/27/2887212414181376/2924073101574144/STEM/fcf2c1ae-923d-44a8-81cb-24a31668b4d6.png?resizew=169)
(1)求证:
平面
;
(2)若
,二面角
的大小为
,求直线
与平面
所成角的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36c4559d27e3905980d1a4f1856f07de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b253f55d19e2cc6602c5f4897c84e54.png)
![](https://img.xkw.com/dksih/QBM/2021/12/27/2887212414181376/2924073101574144/STEM/fcf2c1ae-923d-44a8-81cb-24a31668b4d6.png?resizew=169)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/063510e3c1fb6a7ccc3b8e3e3c7d660e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bffd657e48b15b9b54a55817e2c26b22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f1854ba6cc92481d7a616bd2788a47e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d88591679796c52024d11c4de641bdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7f6f93171329d508d491143b9d71f7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
您最近一年使用:0次
2022-02-25更新
|
354次组卷
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3卷引用:黑龙江省嫩江市第一中学等2021-2022学年高三上学期期末联考数学(理)试题
名校
6 . 如图,在四棱锥
中,底面
是矩形,
平面
,
为垂足.
![](https://img.xkw.com/dksih/QBM/2022/1/25/2902163972571136/2921877828386816/STEM/bd02a0ef-2498-4b62-aec3-7c6404437b83.png?resizew=308)
(1)当点
在线段
上移动时,判断
是否为直角三角形,并说明理由;
(2)若![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e310c862bdfb30b7f66a5c417e04dd16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a9bfa68259d7a331be323b2038d628a.png)
,且
与平面
所成角为
,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/a1597af5a4405ce68f5a97c87de4df7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/2022/1/25/2902163972571136/2921877828386816/STEM/bd02a0ef-2498-4b62-aec3-7c6404437b83.png?resizew=308)
(1)当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c105d6ba18fbb0581fb982175e2eac9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e310c862bdfb30b7f66a5c417e04dd16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a9bfa68259d7a331be323b2038d628a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e6c2dad46a9052a4185a4f7b4ae8a2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ac09dc1ca2cdd7aef28c218763d3e4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/334b0be972ebf5a46333c0c4369aa90a.png)
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2022-02-22更新
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1497次组卷
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3卷引用:贵州省贵阳市普通中学2022届高三上学期期末监测考试数学(理)试题
7 . 正四棱柱
的底面边长为2,侧棱长为4.E为棱
上的动点,F为棱
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/aa14911e-f7f9-41f4-a4a8-691dab673e73.png?resizew=126)
(1)证明:
;
(2)若E为棱
上的中点,求直线BE到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/aa14911e-f7f9-41f4-a4a8-691dab673e73.png?resizew=126)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfecf23b5eeb840952783ed4e67a9dd8.png)
(2)若E为棱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68329e13570eccb6e87f6545d65dfd2c.png)
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8 . 如图1,在△MBC中,
,A,D分别为棱BM,MC的中点,将△MAD沿AD折起到△PAD的位置,使
,如图2,连结PB,PC,BD.
![](https://img.xkw.com/dksih/QBM/2022/1/19/2897682652315648/2917084287582208/STEM/76a645b3-9dbc-4243-bb2e-65ceb1457dbe.png?resizew=285)
(1)求证:平面PAD⊥平面ABCD;
(2)若E为PC中点,求直线DE与平面PBD所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36eab98c6833c1bda76af488bc60d823.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81f17680a23635f823b7dc446e4f3b0a.png)
![](https://img.xkw.com/dksih/QBM/2022/1/19/2897682652315648/2917084287582208/STEM/76a645b3-9dbc-4243-bb2e-65ceb1457dbe.png?resizew=285)
(1)求证:平面PAD⊥平面ABCD;
(2)若E为PC中点,求直线DE与平面PBD所成角的正弦值.
您最近一年使用:0次
2022-02-15更新
|
185次组卷
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2卷引用:福建省福州市福清第三中学等六校2021-2022学年高二上学期期末联考数学试题
名校
解题方法
9 . 在正方体
中,E,F,G分别为BC,
,
的中点,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
A.直线![]() | B.直线![]() |
C.平面AEF与底面ABCD的夹角余弦值为![]() | D.点C与点G到平面AEF的距离相等 |
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2022-02-15更新
|
412次组卷
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2卷引用:福建省福州市福清第三中学等六校2021-2022学年高二上学期期末联考数学试题
名校
10 . 如图,在四棱锥
中,
底面ABCD,底面ABCD是边长为2的菱形,且
,E是BC的中点.
![](https://img.xkw.com/dksih/QBM/2022/1/11/2892256819879936/2916954097631232/STEM/6707fc5b-b5cb-467a-b6fa-7e66ac1cc86a.png?resizew=212)
(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/5a1b49f64e0065edad868b25e9fcada3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f945a69cf7e8213e50622125cde652f5.png)
![](https://img.xkw.com/dksih/QBM/2022/1/11/2892256819879936/2916954097631232/STEM/6707fc5b-b5cb-467a-b6fa-7e66ac1cc86a.png?resizew=212)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e37c9f2fec8e6966125547af2628d9bf.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/036de574712cad14bddadf6653c7e714.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1069d514c3c32aeabd274475ee209ed6.png)
您最近一年使用:0次
2022-02-15更新
|
501次组卷
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2卷引用:山东省滨州市2021-2022学年高三期末数学试题