解题方法
1 . 如图,四棱锥
中,侧面
平面
,
,
,
.点
为棱
的中点,平面
与棱
相交于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/6/fe57b655-7858-466a-aeeb-14a7830994f7.png?resizew=206)
(1)求证:
为
中点;
(2)再从条件①、条件②这两个条件中选择一个作为已知,求二面角
的大小.
条件①:
;
条件②:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.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/4299cca48ff6abfb252ef73b5e62317d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87261df80b82221732329b6ef3fdda7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c83b76a280fc562446ee8ddd2d6bf1d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb58ca76c1fb28b4cb408bb9897b70a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/6/fe57b655-7858-466a-aeeb-14a7830994f7.png?resizew=206)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
(2)再从条件①、条件②这两个条件中选择一个作为已知,求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47d294d69caac577339f11f477b2047e.png)
条件①:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90da62f1614568a0b1e5e47ea85e7e3c.png)
条件②:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ed66431681da1db8f7cb0f40cd19201.png)
您最近一年使用:0次
名校
解题方法
2 . 如图所示,在四棱锥
中,
平面
,
,
是
的中点.
;
(2)求证:
平面
;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08f8b463fcecf0a757f386db56e074d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e306e30d3159e4a68435c3fcfc8da693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5acb763021bf166ca719d07223591d9.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7175df06e33cad4e6bbc3f2f6b0a2986.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/218054144a13435580cd132b9459546c.png)
您最近一年使用:0次
2023-06-09更新
|
1953次组卷
|
7卷引用:北京市朝阳区清华大学附属中学朝阳学校2022-2023学年高一下学期期中考试数学试题
北京市朝阳区清华大学附属中学朝阳学校2022-2023学年高一下学期期中考试数学试题北京高一专题09立体几何北京市第二中学2023-2024学年高一下学期期中考试数学试题(已下线)第03讲 空间中平行、垂直问题10种常见考法归类(1)(已下线)10.3 直线与平面间的位置关系(第1课时)(八大题型)(分层练习)-2023-2024学年高二数学同步精品课堂(沪教版2020必修第三册)(已下线)8.5空间直线、平面的平行——课后作业(基础版)(已下线)第六章立体几何初步章末二十种常考题型归类(2)-【帮课堂】(北师大版2019必修第二册)
名校
解题方法
3 . 如图,在四棱锥
中,
平面PAD,△PAD为等边三角形,
//
,
,平面PBC交平面PAD直线l,E、F分别为棱PD,PB的中点.
∥
;
(2)求平面AEF与平面PAD所成锐二面角的余弦值;
(3)在棱PC上是否存在点G,使得
∥平面AEF?若存在,求
的值,若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97f30533da2e1d2a958dc906c37eba9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7df3cbb0e21389791a038f7a9ce6a327.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
(2)求平面AEF与平面PAD所成锐二面角的余弦值;
(3)在棱PC上是否存在点G,使得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e72b2e1ff83e95df048745322982451.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf3b1771fbc438ff888bd28bb1dadcee.png)
您最近一年使用:0次
2023-05-31更新
|
2275次组卷
|
8卷引用:北京市首都师范大学附属中学2023届高三下旬阶段性检测数学试题
北京市首都师范大学附属中学2023届高三下旬阶段性检测数学试题北京市第十五中学2023-2024学年高二上学期期中考试数学试题北京市牛栏山一中2024届高三下学期学期考前热身(三模)数学试题(已下线)2023年新课标全国Ⅰ卷数学真题变式题15-18湖南省长沙市第一中学2022-2023学年高二下学期期末数学试题(已下线)第03讲 直线、平面平行的判定与性质(练习)(已下线)重难点突破06 立体几何解答题最全归纳总结(九大题型)-1新疆维吾尔自治区乌鲁木齐市第十二中学2024届高三上学期12月月考数学试题
名校
解题方法
4 . 如图,在正方体
中,
为
中点,
与平面
交于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/12/cc5560ad-8d3b-4fcc-be7e-50ea0b8a9752.png?resizew=148)
(1)求证:
面
;
(2)求证:
为
的中点.
![](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/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c0c628968603b80f05ab8d063a38026.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/12/cc5560ad-8d3b-4fcc-be7e-50ea0b8a9752.png?resizew=148)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f5830646a912c3a916beac4f88c116b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2331bccb6ebf5b9fd639df994f575a9.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
您最近一年使用:0次
2023-05-10更新
|
2618次组卷
|
8卷引用:北京市第一六六中学2022-2023学年高一下学期期中诊断数学试题
北京市第一六六中学2022-2023学年高一下学期期中诊断数学试题(已下线)专题训练:线线、线面、面面平行证明(已下线)第06讲 立体几何位置关系及距离专题期末高频考点题型秒杀(已下线)模块一 专题5 立体几何初步(2)(人教B)(已下线)模块一 专题5 立体几何初步(2)(北师大版)(已下线)模块一 专题3 立体几何初步(2)(人教A)(已下线)模块一 专题5 立体几何初步(2)(苏教版)宁夏贺兰县第一中学2022-2023学年高一下学期数学期末复习试题(三)
名校
解题方法
5 . 如图,在三棱柱
中,侧面
为正方形,
,
,点
在线段
上,
平面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/9/6d778f42-b452-47c0-8785-71fcde5cba07.png?resizew=177)
(1)求证:
为
的中点;
(2)求二面角
的大小;
(3)在线段
上是否存在点
,使得直线
与平面
所成的角为
,若存在,求出
的值;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36571ba4081921352cfb9cee56b8e211.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9510f7b63288cddc6ee8456bcaf454fe.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/36222db36e348661eb5f616820e4e60f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb304d905125170bebfada27e7ed8960.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/9/6d778f42-b452-47c0-8785-71fcde5cba07.png?resizew=177)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2425afeae790f548529e24c81a40560c.png)
(3)在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c54d01623f09f23103f03ba1135fc6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ac09dc1ca2cdd7aef28c218763d3e4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec72f31d25f6f257cdee191b8c381a0b.png)
您最近一年使用:0次
2023-01-08更新
|
993次组卷
|
6卷引用:北京市第八中学2022-2023学年高二上学期期末练习数学试题
北京市第八中学2022-2023学年高二上学期期末练习数学试题3.4向量在立体几何中的应用 测试卷-2022-2023学年高二上学期数学北师大版(2019)选择性必修第一册山东省滕州市第一中学2022-2023学年高二上学期期末数学试题(已下线)第一章:空间向量与立体几何章末重点题型复习-【题型分类归纳】2023-2024学年高二数学同步讲与练(人教A版2019选择性必修第一册)广东省广州市第八十九中学2023-2024学年高二上学期期末模拟数学试题(一)(已下线)第五章 破解立体几何开放探究问题 专题一 立体几何存在性问题 微点1 立体几何存在性问题的解法【培优版】
名校
解题方法
6 . 如图,在四棱锥
中,底面
为平行四边形,
平面
,点
在棱
上,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
平面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/5/66e59271-7afc-4d8d-8958-4c45daa5a777.png?resizew=185)
(1)求证:
是棱
的中点;
(2)再从条件①、条件②这两个条件中选择一个作为已知,求:
(i)二面角
的余弦值;
(ii)在棱
上是否存在点
,使得
平面
?若存在,求出
的值;若不存在,说明理由.
条件①:
;
条件②:
.
注:如果选择条件①和条件②分别解答,按第一个解答计分.
![](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/a8e70caa84b90be321cd7624b1565740.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/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895d6f710d5f67e1d4c7408d50d77281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bc46688d8723cf2003fc25890265200.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/5/66e59271-7afc-4d8d-8958-4c45daa5a777.png?resizew=185)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
(2)再从条件①、条件②这两个条件中选择一个作为已知,求:
(i)二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64785e4401e1d79632e360fd3626ed62.png)
(ii)在棱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c5197adf1af97b29adc08417400807c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bc46688d8723cf2003fc25890265200.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bc953f0be1dafec1b4d1836cbafbf59.png)
条件①:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f945a69cf7e8213e50622125cde652f5.png)
条件②:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/714cc3707bba3bfdb56e251999be8592.png)
注:如果选择条件①和条件②分别解答,按第一个解答计分.
您最近一年使用:0次
2023-01-05更新
|
352次组卷
|
2卷引用:北京市昌平区2022-2023学年高二上学期期末质量检测数学试题
7 . 如图,在四棱锥
中,底面
是边长为
的正方形,侧面
为等腰直角三角形,且
,点
为棱
上的点,平面
与棱
交于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/20/09bdcc80-e0b1-4e87-904b-91e9d73ddd4b.png?resizew=152)
(1)求证:
;
(2)从条件①、条件②、条件③这三个条件中选择两个作为已知,求平面
与平面
所成锐二面角的大小.
条件①:
;
条件②:平面
平面
;
条件③:
.
![](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/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d96c0afa541ea653e6fa345ba93b287c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fa3254460ecbacecb3e57c5dce227f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/20/09bdcc80-e0b1-4e87-904b-91e9d73ddd4b.png?resizew=152)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd6020b78ff385667b30088ecadeadd3.png)
(2)从条件①、条件②、条件③这三个条件中选择两个作为已知,求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e08c14e87a2bcf7090eab2fea73667d2.png)
条件①:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/338c6c83ab4abc895ac36ab888a55be6.png)
条件②:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93edc7bb513f40a89173121c8570cd65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
条件③:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65355f6a872f7148e4efd9e3bf877860.png)
您最近一年使用:0次
2023-05-12更新
|
988次组卷
|
4卷引用:北京市海淀外国语实验学校2023届高三三模检测数学试题
名校
8 . 在四棱锥P-ABCD中,底面ABCD为直角梯形,
,
,
,E为线段AD的中点.PE⊥底面ABCD,点F是棱PC的中点,平面BEF与棱PD相交于点G.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/29/7970cfeb-0c9d-4ce5-82be-2be538a59247.png?resizew=128)
(1)求证:
;
(2)若PC与AB所成的角为
,求直线PB与平面BEF所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d730ae4307db56b47849c3a19dedfb3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4795ee1f96b430529934e2231b38885d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/639bec6242a4b3f7bfb4b7033a67328c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/29/7970cfeb-0c9d-4ce5-82be-2be538a59247.png?resizew=128)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16b8b871bc2a1c85da6a27451dbbf522.png)
(2)若PC与AB所成的角为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15615de1a6df206dbd081251f676578e.png)
您最近一年使用:0次
2023-04-28更新
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1357次组卷
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6卷引用:北京市海淀区2020届高三年级第二学期期末练习(二模)数学试题
名校
解题方法
9 . 在四棱锥
中,平面
平面
,底面
为直角梯形,
,
,
为等腰三角形
底边
的中点,且
,
.点
是棱
的中点,平面
与棱
相交于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/9/89f56283-4961-4d73-8468-8b9009c67cf2.png?resizew=169)
(1)求证:
;
(2)求二面角
的余弦值;
(3)设
为
中点,
平面
,求线段
长度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.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/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5acb763021bf166ca719d07223591d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32e1b499d6b25ee132abcdd3f3cd288.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/639bec6242a4b3f7bfb4b7033a67328c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d83158b41d18d566f6e155c79580c0d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87c0bfeadcf17b2a45896071f07a4a5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/9/89f56283-4961-4d73-8468-8b9009c67cf2.png?resizew=169)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b1f0b27c8379b2bca3c56a5b05b047e.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a57299998bfd9947ec3e28807c7c35f0.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3703966b33f391bcd03a6cf1ddceb7f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7ca4bcfbcaff210399c76914f2eb2be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
您最近一年使用:0次
2023·北京·模拟预测
名校
10 . 如图所示,在三棱柱
中,
是
中点,
平面
,平面
与棱
交于点
,
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3570a95f68349fcd9417fcda62e78e7e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/24/a1dd9944-1cbf-46ba-953a-bd74bfaf7840.png?resizew=170)
(1)求证:
;
(2)若
与平面
所成角的正弦值为
,求三棱锥
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4890e58791814622b87c4d60ea971f54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d1a1b7edecd3344707cf04ea3e86916.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1f229274a6e17977cc047814212589.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16cfb38323095090b0fe5eee70b24210.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3570a95f68349fcd9417fcda62e78e7e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/24/a1dd9944-1cbf-46ba-953a-bd74bfaf7840.png?resizew=170)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7a2f55320edad0d0e73df2877a38538.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7f6f93171329d508d491143b9d71f7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9b7b7793d29d66dfdd89e7a6564a35c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3aace91caec728e174daec29a3568ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8416d7e43a39b554ebc443a06192634.png)
您最近一年使用:0次
2023-03-22更新
|
973次组卷
|
3卷引用:北京市第四中学2023届高三阶段性考试(零模)数学试题
(已下线)北京市第四中学2023届高三阶段性考试(零模)数学试题宁夏回族自治区石嘴山市大武口区石嘴山市第三中学2023届高三三模理科数学试题辽宁省东北育才学校科学高中部2023-2024学年高二上学期第一次月考数学试题