解题方法
1 . 如图,菱形
和正方形
所在平面互相垂直,
,
.
(1)求证:
平面
;
(2)若
是线段
上的动点,求平面
与平面
夹角的余弦值的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f84f169e50dc59d4f7a8e1e36f5c847.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f945a69cf7e8213e50622125cde652f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/7/66c3ac34-9141-4a12-a981-337d6830ce36.png?resizew=158)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31c34b18525831f3eda7bb90be0199b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a09d9d486b7f91ba933210dd013a7f2c.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6439082496df7567acd5a31a3448db71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
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2023-09-07更新
|
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3卷引用:山西省金科大联考2023-2024学年高二上学期开学考试数学试题
山西省金科大联考2023-2024学年高二上学期开学考试数学试题河北省沧州市运东七县联考2023-2024学年高二上学期10月月考数学试题(已下线)专题09 空间向量中动点的设法2种常见考法归类 - 【考点通关】2023-2024学年高二数学高频考点与解题策略(人教A版2019选择性必修第一册)
2 . 如图所示的四棱锥
的底面
是一个等腰梯形,
,且
,
是
的中线,点
是棱
的中点.
![](https://img.xkw.com/dksih/QBM/2021/12/29/2883068883615744/2886408744034304/STEM/bcde2e88-cdec-4b1c-b8ab-f5c677187bd7.png?resizew=156)
(1)证明:
平面
.
(2)若平面
平面
,且
,
,求平面
与平面
所成锐二面角的余弦值.
![](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/1e62ca104bd39a1646922b5836f1826b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef49a3ca580a144cc65a609c167facc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55a675310c8ba418e5a59beb7317e21e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://img.xkw.com/dksih/QBM/2021/12/29/2883068883615744/2886408744034304/STEM/bcde2e88-cdec-4b1c-b8ab-f5c677187bd7.png?resizew=156)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d27ff0b39832f094ec51e28721d739.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
(2)若平面
![](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/62974d34de3a12418d6b700420afd1b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb201fb1a8247cee1cd3aa2bf33690f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
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2022-01-03更新
|
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5卷引用:专题3.3 选修一+选修二第四章数列(中)-【满分计划】2021-2022学年高二数学阶段性复习测试卷(人教A版2019选择性必修第二册)
(已下线)专题3.3 选修一+选修二第四章数列(中)-【满分计划】2021-2022学年高二数学阶段性复习测试卷(人教A版2019选择性必修第二册)河南省2021-2022学年高三上学期第五次联考理科数学试题广东省部分学校2022届高三上学期12月联考数学试题(已下线)专题3.1 模拟卷(1)-2022年高考数学大数据精选模拟卷(新高考地区专用)(已下线)专题10 盘点求二面角的三种方法-2
名校
解题方法
3 . 如图,在四棱锥
中,底面
为平行四边形,
,
分别为
,
的中点.设平面
与平面
的交线为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/14/a5284665-ac13-4c79-b1e8-14b9c9f1bb74.png?resizew=173)
(1)求证:
平面
;
(2)求证:
;
(3)在棱
上是否存在点
(异于点
),使得
平面
?若存在,求出
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/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](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://img.xkw.com/dksih/QBM/editorImg/2023/1/14/a5284665-ac13-4c79-b1e8-14b9c9f1bb74.png?resizew=173)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a75844725734f498eb983fe76cece2f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/253c6a4ac9d325987854abe00a0e0b6f.png)
(3)在棱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a619288429fb6f75cc51f6c7fa43d03a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9ae8a3c30480b46d1cb81cf5745f2ae.png)
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2021-07-15更新
|
1548次组卷
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3卷引用:四川省眉山市仁寿第一中学南校区2021-2022学年高二上学期10月月考数学试题
四川省眉山市仁寿第一中学南校区2021-2022学年高二上学期10月月考数学试题北京市首都师范大学附属中学2020-2021学年高一下学期期末数学试题(已下线)一轮复习大题专练46—立体几何(探索性问题2)-2022届高三数学一轮复习
名校
解题方法
4 . 如图,已知四棱锥
中,平面
平面
,底面
为矩形,且
,
,
,O为棱AB的中点,点E在棱AD上,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/14/8eb491b9-25ff-4831-8f9d-42d4f31afc2f.png?resizew=172)
(1)证明:
;
(2)在棱PB上是否存在一点F使
平面
?若存在,请指出点F的位置并证明;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4aa9084b8fe0fe05c4388d1f835587b.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/d7005932de8ace6e3c78a754c35466d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0d5a2cd05e4476fc72271e8fdb59a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/940099db7ffe6b3f7e70afcfba66750a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/14/8eb491b9-25ff-4831-8f9d-42d4f31afc2f.png?resizew=172)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f5ffe436f8eb53a211abf95baed8ca9.png)
(2)在棱PB上是否存在一点F使
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9e447c70f2ad6d6a38afd6cad312007.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bf12905647aeeded72bbca21a63f319.png)
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2022-07-13更新
|
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5卷引用:江西省遂川中学2022-2023学年高二上学期期末考试数学试题
江西省遂川中学2022-2023学年高二上学期期末考试数学试题辽宁省锦州市2021-2022学年高一下学期期末数学试题(已下线)第03讲 空间直线、平面的平行 (精讲)-2(已下线)模块四 专题1 期末重组综合练(辽宁)(人教B)辽宁省鞍山市一般高中协作校(含矿山高级中学、文化学校等)2022-2023学年高一下学期6月月考数学试题
名校
解题方法
5 . 已知直四棱柱
,
,
,
,
,
.
平面
;
(2)若该四棱柱的体积为
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1134c8e3440abb6cd385af2c169037fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10df84d553a8826a7ce9bff4bf0d95b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0d5a2cd05e4476fc72271e8fdb59a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e673ef2d48215ca84a48377f17d6df00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ebe6a446b91e73b181f9f4d56264dd3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b54387f870ae37f7951b253665d64f6.png)
(2)若该四棱柱的体积为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/492b6d3883713fcaa8a4fdd87b87b480.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a696a182fff038a86b2bbe8ca099442.png)
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2023-11-10更新
|
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4卷引用:上海市虹口高级中学2023-2024学年高二上学期期中数学试题
上海市虹口高级中学2023-2024学年高二上学期期中数学试题江西省抚州市资溪县第一中学2023-2024学年高二上学期期中调研数学试题(已下线)第05讲 空间直线﹑平面的平行-《知识解读·题型专练》(已下线)11.3.3平面与平面平行-同步精品课堂(人教B版2019必修第四册)
名校
解题方法
6 . 如图,在四棱锥
中,
,
,
,点P在以AB为直径的半圆上(不包括端点),平面
平面ABCD,E,F分别是BC,AP的中点.
![](https://img.xkw.com/dksih/QBM/2023/1/14/3152504890851328/3153960178040832/STEM/27013859caa042dba47c0d9d5f678dd4.png?resizew=189)
(1)证明:
平面PCD;
(2)当
时,求直线EF与平面PBC所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0fff774b4b0087a6f304ce930d359be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a0e5697eca3f5205cb7b343648240bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/555e29e445c95ddb514840f63fbb1d12.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/baf42acb8d1875acf1775e30ae2e3d62.png)
![](https://img.xkw.com/dksih/QBM/2023/1/14/3152504890851328/3153960178040832/STEM/27013859caa042dba47c0d9d5f678dd4.png?resizew=189)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/073a88b42836fb88433679932b48ad03.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a95d82d0c6d849d7b55491e472b88ab.png)
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|
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2卷引用:安徽省涡阳第四中学2022-2023学年高二下学期第二次月考数学试题
名校
解题方法
7 . 如图,在四面体A-BCD中,AB⊥平面BCD,BC⊥CD,BC=2,∠CBD=
,E、F、Q分别为BC、BD、AB边的中点,P为AD边上任意一点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/15/d4af287d-9e2d-4522-a3b7-9bfd785b4b2a.png?resizew=148)
(1)证明:CP
平面QEF.
(2)当二面角B-QF-E的平面角为
时,求AB的长度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15615de1a6df206dbd081251f676578e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/15/d4af287d-9e2d-4522-a3b7-9bfd785b4b2a.png?resizew=148)
(1)证明:CP
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb31ef428bd9de9bc875b343feded3c7.png)
(2)当二面角B-QF-E的平面角为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac1a63ab608517bb10aa036783dfb51f.png)
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|
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6卷引用:山东省德州市夏津第一中学2020-2021学年高二上学期9月月考数试题
2023高二·全国·专题练习
8 . 直四棱柱
,
,
,
,
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49437f474e5805688dff21ded2d1fd7c.png)
平面
;
(2)若四棱柱体积为36,求二面角
大小的正切值
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee8ef58be8708144272538ee427fb92c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1134c8e3440abb6cd385af2c169037fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0d5a2cd05e4476fc72271e8fdb59a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49437f474e5805688dff21ded2d1fd7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ebe6a446b91e73b181f9f4d56264dd3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b54387f870ae37f7951b253665d64f6.png)
(2)若四棱柱体积为36,求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cab6ad3d3e3064fa417a02dba02dbf04.png)
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2023-08-23更新
|
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4卷引用:第09讲 拓展三:二面角的传统法与向量法(含探索性问题,7类热点题型讲练)-【帮课堂】2023-2024学年高二数学同步学与练(人教A版2019选择性必修第一册)
(已下线)第09讲 拓展三:二面角的传统法与向量法(含探索性问题,7类热点题型讲练)-【帮课堂】2023-2024学年高二数学同步学与练(人教A版2019选择性必修第一册)(已下线)专题突破卷19传统方法求夹角及距离-2(已下线)第17讲 第八章 立体几何初步 章末重点题型大总结-【帮课堂】(人教A版2019必修第二册)(已下线)重难点专题14 利用传统方法解决二面角问题-【帮课堂】(苏教版2019必修第二册)
21-22高一下·浙江·期中
9 . 已知三棱锥
中,△ABC,△ACD都是等边三角形,
,E,F分别为棱AB,棱BD的中点,G是△BCE的重心.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/30/4c768d18-52ee-428a-958c-36eeb689cbf2.png?resizew=196)
(1)求异面直线CE与BD所成角的余弦值;
(2)求证:FG
平面ADC.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53b94651d11df3a469d7ac72e6ac74c7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/30/4c768d18-52ee-428a-958c-36eeb689cbf2.png?resizew=196)
(1)求异面直线CE与BD所成角的余弦值;
(2)求证:FG
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638537c0a30676c73fea76c80e0f8bd0.png)
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10 . 如图,在四棱锥
中,底面ABCD为正方形,且侧棱PA⊥底面ABCD,PA=2AD.E,F,H分别是PA,PD,AB的中点,G为DF的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/10/58d88241-48a0-47ae-832a-27407197fe0e.png?resizew=156)
(1)证明:
平面BEF;
(2)求PC与平面BEF所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/10/58d88241-48a0-47ae-832a-27407197fe0e.png?resizew=156)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96b8c2721ada247b03f41f328539b301.png)
(2)求PC与平面BEF所成角的正弦值.
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2022-08-08更新
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