真题
名校
1 . 在如图所示的圆台中,AC是下底面圆O的直径,EF是上底面圆O
的直径,FB是圆台的一条母线.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/3/f0218997-2f80-43b2-8240-e0f8c27d5e25.png?resizew=200)
(Ⅰ)已知G,H分别为EC,FB的中点,求证:GH∥平面ABC;
(Ⅱ)已知EF=FB=
AC=
,AB=BC.求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9041a3dc5017c192cad54b40aa3f35f9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/3/f0218997-2f80-43b2-8240-e0f8c27d5e25.png?resizew=200)
(Ⅰ)已知G,H分别为EC,FB的中点,求证:GH∥平面ABC;
(Ⅱ)已知EF=FB=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38387ba1cadfd3dfc4dea4ca9f613cea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47342449ca1a78a7550975a7589003c5.png)
您最近一年使用:0次
2016-12-04更新
|
2122次组卷
|
11卷引用:2016年全国普通高等学校招生统一考试理科数学(山东卷精编版)
2016年全国普通高等学校招生统一考试理科数学(山东卷精编版)(已下线)2016年全国普通高等学校招生统一考试理科数学(山东卷参考版)2016-2017学年河北定州市高二上学期期中数学试卷人教A版高中数学必修二 2.3.2 平面与平面垂直的判定(已下线)专题17 立体几何综合-五年(2016-2020)高考数学(理)真题分项湖北省黄冈中学2021届高三下学期5月适应性考试数学试题河北正定中学2021届高三上学期第四次半月考数学试题沪教版(2020) 一轮复习 堂堂清 第八单元 8.10 空间向量在立体几何中的应用(二)(已下线)专题24 空间向量与空间角的计算-十年(2011-2020)高考真题数学分项(已下线)专题23 立体几何解答题(理科)-1专题31立体几何与空间向量解答题(第二部分)
名校
解题方法
2 . 如图所示的几何体是由等高的
个圆柱和半个圆柱组合而成,点G为
的中点,D为
圆柱上底面的圆心,DE为半个圆柱上底面的直径,O,H分别为DE,AB的中点,点A,D,E,G四点共面,AB,EF为母线.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/28/8af8d836-1e50-43b9-bcdb-f1e5b4fda145.png?resizew=172)
(1)证明:
平面BDF;
(2)若平面BDF与平面CFG所成的较小的二面角的余弦值为
,求直线OH与平面CFG所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d266a04f3dc7483eddbc26c5e487db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0c44512cb86bcf48c6d21357f45b533.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d266a04f3dc7483eddbc26c5e487db.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/28/8af8d836-1e50-43b9-bcdb-f1e5b4fda145.png?resizew=172)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97776c09f988638731deef0bad52cb46.png)
(2)若平面BDF与平面CFG所成的较小的二面角的余弦值为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83303d3784492506fc44f2b4d6b07bc1.png)
您最近一年使用:0次
2022-11-26更新
|
483次组卷
|
5卷引用:山东省潍坊市昌乐第一中学2024届高三上学期12月月考数学试题
解题方法
3 . 如图,在五面体ABCDEF中,面
是正方形,
,
,
,且
.
![](https://img.xkw.com/dksih/QBM/2020/11/5/2586652106489856/2587378337193984/STEM/e04fac876bd647d5be63e867b2a2cb01.png?resizew=282)
(1)求证:
平面
;
(2)求直线BD与平面ADE所成角的正弦值;
(3)设M是CF的中点,棱
上是否存在点G,使得
平面ADE?若存在,求线段AG的长;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c1c122603b60b6f1a1334ddb56c3fb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc11331a7b2d2619b40ee6d34c3bd620.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44b31e19fa5cf6d4d5f14f90e87d34ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85caed30a9d505b1e77577915bb2bd38.png)
![](https://img.xkw.com/dksih/QBM/2020/11/5/2586652106489856/2587378337193984/STEM/e04fac876bd647d5be63e867b2a2cb01.png?resizew=282)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca5dd496ee0c1170ef6dcc48266ee444.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32c05247f6998d7a70d31d13be4148c.png)
(2)求直线BD与平面ADE所成角的正弦值;
(3)设M是CF的中点,棱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6287c16246f1c50ea26efc09040333ec.png)
您最近一年使用:0次
2020-11-06更新
|
1030次组卷
|
5卷引用:山东省青岛市青岛第九中学2022-2023学年高一下学期期末数学试题
山东省青岛市青岛第九中学2022-2023学年高一下学期期末数学试题北京市朝阳区2020届高三年级下学期二模数学试题(已下线)考点31 直线、平面垂直的判定及其性质-备战2021年高考数学(文)一轮复习考点一遍过(已下线)考点32 直线、平面垂直的判定及其性质-备战2021年高考数学(理)一轮复习考点一遍过(已下线)专题33 空间中线线角、线面角,二面角的求法-学会解题之高三数学万能解题模板【2022版】
名校
解题方法
4 . 如图,在三棱锥
中,
平面
,
,
.求证:
;
(2)若
,
分别在棱
,
上,且
,
,问在棱
上是否存在一点
,使得
平面
.若存在,则求出
的值;若不存在.请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5f1897a7e856b42f8cee0f286ad913d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c71dbf267939080668be464f1aa60da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0530f462e5ec1e58c46e1f7644d0cc21.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98de02d1d5b7ac04bce54be393218922.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/760e8882e84ecd68bc889a55efce5d03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d3f076d3f5a78fc081c252e9a55d5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87c0bfeadcf17b2a45896071f07a4a5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/261fbbc173664b0047448fef17763dfb.png)
您最近一年使用:0次
2021-08-07更新
|
612次组卷
|
6卷引用:山东省临沂市第三中学北校区2023-2024学年高一下学期6月月考数学试题
解题方法
5 . 如图,平面
平面
,四边形
为矩形,
和
均为等腰直角三角形,且
.
![](https://img.xkw.com/dksih/QBM/2021/10/24/2836443365507072/2838620690685952/STEM/666fa56bf29c492886ea5d466a5bca9c.png?resizew=187)
(1)求证:平面
平面
;
(2)若点
为线段
上任意一点,求证:
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cf9a6db3571fa57bfa2d5e4d44c51b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5ec3f44cd7f4689920e5df628177737.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e742966e3711cfa53dce04022acf4bcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/004104bafb5f30338123d4ea2b7fedde.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52c5fd1c0e29b240c0b8906ca9054a46.png)
![](https://img.xkw.com/dksih/QBM/2021/10/24/2836443365507072/2838620690685952/STEM/666fa56bf29c492886ea5d466a5bca9c.png?resizew=187)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39282bdf319f30d7bc261e2e3ab3b1e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a32bd7a1b78b5a0ec562c4025aea8c.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/735056c174e8dd7906257a2a50a962a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e60db93cd34a54c98da9ff9782656c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a32bd7a1b78b5a0ec562c4025aea8c.png)
您最近一年使用:0次
2021-10-27更新
|
647次组卷
|
3卷引用:山东省潍坊安丘市等三县2021-2022学年高三上学期10月过程性测试数学试题
名校
6 . 如图,三棱柱ABC-A1B1C1中,侧棱AA1⊥平面ABC,△ABC为等腰直角三角形,∠BAC=90°,且AB=AA1=2,E,F分别为CC1,BC的中点.
![](https://img.xkw.com/dksih/QBM/2021/8/1/2777024024166400/2821869803700224/STEM/1605a151-da7e-4e64-b794-21a560e3bde1.png)
(1)若D是AA1的中点,求证:BD∥平面AEF;
(2)若M是线段AE上的任意一点,求直线B1M与平面AEF所成角的正弦的最大值.
![](https://img.xkw.com/dksih/QBM/2021/8/1/2777024024166400/2821869803700224/STEM/1605a151-da7e-4e64-b794-21a560e3bde1.png)
(1)若D是AA1的中点,求证:BD∥平面AEF;
(2)若M是线段AE上的任意一点,求直线B1M与平面AEF所成角的正弦的最大值.
您最近一年使用:0次
2021-10-04更新
|
598次组卷
|
4卷引用:山东省济宁市2017-2018学年度高三上学期期末考试 数学(理)试题
山东省济宁市2017-2018学年度高三上学期期末考试 数学(理)试题人教A版(2019) 选择性必修第一册 过关斩将 第一章 空间向量与立体几何 本章复习提升(已下线)第一章 空间向量与立体几何(本章复习提升)-2021-2022学年高二数学同步练习和分类专题教案(人教A版2019选择性必修第一册)安徽省亳州市第二中学2021-2022学年高二上学期第一次月考数学试题
7 . 如图,四棱台
中,底面
为直角梯形,
,
,
底面
,
,
为棱
的中点.
![](https://img.xkw.com/dksih/QBM/2021/5/25/2728608680091648/2730549494497280/STEM/e95acb5ea37842b4b9148cc175ffa50d.png?resizew=238)
(1)证明:
平面
;
(2)求二面角
的余弦值.
![](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/10df84d553a8826a7ce9bff4bf0d95b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ddbb0422a136f45653c8c369f2d75fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/002d4cc229c749c2e87b1223f6875a6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://img.xkw.com/dksih/QBM/2021/5/25/2728608680091648/2730549494497280/STEM/e95acb5ea37842b4b9148cc175ffa50d.png?resizew=238)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8197bf06d017950c85c3ba6a291c095e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43d9cfaf9f27981a0dac2b452f5ce5fb.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dac4848337bda9fbda220e41a7157919.png)
您最近一年使用:0次
名校
8 . 已知四边形
是矩形,
平面
,
、
分别是
、
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/3/a1ca062c-746b-413d-bf0a-49d0391f7a12.png?resizew=188)
(Ⅰ)求证:
平面
;
(Ⅱ)若二面角
为
,
,
,求
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/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/3/a1ca062c-746b-413d-bf0a-49d0391f7a12.png?resizew=188)
(Ⅰ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dcafa398cc6b6079883e7ad153eb62d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9068f29d671d76d1e95ba3a4eaff5b96.png)
(Ⅱ)若二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21d9f756419912dd298a0d6857130c80.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a97bb4dcfab4ec7539bc783d563c49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d27bd71d79cb19eb554175e4ef0867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55c24a968c73e960698a572ab01e3698.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9068f29d671d76d1e95ba3a4eaff5b96.png)
您最近一年使用:0次
2020-09-05更新
|
753次组卷
|
6卷引用:山东省济南市商河县第一中学2020-2021学年第一学期高二数学期中试题
9 . 如图,四棱锥
中,
为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/30/c12a25b8-e708-4c29-b803-9dca076d8c5f.png?resizew=155)
求证:
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b577ea0e75873c8a27aaa3ed615d1f6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/30/c12a25b8-e708-4c29-b803-9dca076d8c5f.png?resizew=155)
求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/932a04304f2d4975955d4baabb2deeea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
您最近一年使用:0次
2017-12-03更新
|
1373次组卷
|
4卷引用:山东省武城县第二中学高中数学必修二人教A版第二章 直线与平面、平面与平面平行的练习题
10 . 已知正三棱柱
的底面边长为2,点
,
分别为棱
与
的中点.
![](https://img.xkw.com/dksih/QBM/2020/11/21/2597571746922496/2598598526959616/STEM/ce1bbf8a74c64dc38664ee98b376c534.png?resizew=265)
(1)求证:直线
平面
;
(2)若该正三棱柱的体积为
,求直线
与平面
所成角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://img.xkw.com/dksih/QBM/2020/11/21/2597571746922496/2598598526959616/STEM/ce1bbf8a74c64dc38664ee98b376c534.png?resizew=265)
(1)求证:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57f9d682e5d3cc8573574d8d11636758.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9afac7c616bbb14e1ed428a3c507c7dc.png)
(2)若该正三棱柱的体积为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b10e8abf8690e4b129466ddb918bcc94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
您最近一年使用:0次
2020-11-22更新
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558次组卷
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2卷引用:山东省潍坊市2020-2021学年高三上学期期中考试数学试题