名校
解题方法
1 . 如图,在直三棱柱
中,
,点
是棱
上的一点,且
,点
是棱
的中点.
平面
;
(2)求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37daee5542600d83c05b45cbe0750bde.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1c05e654d3ee1ca86bc42cd20ca302c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3547a914468b082d8d8741b974a03190.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13cfdc6224181d44e63aab43ddaf07ef.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ee8456443402a25b1e25d35ff7e1c98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34be4e71cabf458f17a6cd7f24bc70af.png)
您最近一年使用:0次
2024-03-21更新
|
1541次组卷
|
6卷引用:青海省西宁市大通县2024届高三第二次模拟考试数学(理)试题
名校
解题方法
2 . 在三棱柱
中,平面
平面ABC,
,
,D为AC的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/9/041a2939-15e1-4bb7-ac29-13f37a9bea69.png?resizew=188)
(1)求证:平面
平面
;
(2)求
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b76a6f49cd926fc84c00b1ae3152403.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c500982687a39c60f606d7989f2b7dcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c7fd49bb962841b4575805030e19add.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/9/041a2939-15e1-4bb7-ac29-13f37a9bea69.png?resizew=188)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61cdaadeae37736a1e6dd93fa1fe712f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bea124cef7ab3fd8069243e9894d1c59.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e26d9636ad77369535852c6e4493446a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bf9628142422a4884bd59538da6d312.png)
您最近一年使用:0次
解题方法
3 . 如图,已知正方体
的棱长为
,
是
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/9/25bf1257-2b8b-4361-ad25-af28dd025328.png?resizew=159)
(1)求证:
平面
;
(2)求点
到平面
的距离;
(3)求平面
和底面
夹角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/9/25bf1257-2b8b-4361-ad25-af28dd025328.png?resizew=159)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a5928c98b341b16d4b5a5b931d2929d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd7cc5d9199856cb62ac8898664c931.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69bcb3226e013650b7d8827c31dd41d0.png)
(3)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69bcb3226e013650b7d8827c31dd41d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632f2bf1cd0435041fa04b01901d1c8c.png)
您最近一年使用:0次
2023-11-16更新
|
241次组卷
|
3卷引用:青海省西宁市大通县2023-2024学年高二上学期期末考试数学试题
名校
4 . 如图,在四棱锥
中,四边形
是正方形,
,M为侧棱PD上的点,
平面
.
.
(2)若
,求二面角
的大小.
(3)在(2)的前提下,在侧棱PC上是否存在一点N,使得
平面
?若存在,求出
的值;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/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/267172a953126e44e36ab085165543ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1b49f64e0065edad868b25e9fcada3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb304d905125170bebfada27e7ed8960.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccbd1316b9d1f0c1e71fd078deec61f6.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32d0710321d97361e5782124bbf7f0c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f2d2fbc26a7be008f550b5828f615fe.png)
(3)在(2)的前提下,在侧棱PC上是否存在一点N,使得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f214481e6b23307a37940f6dd0313d30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb304d905125170bebfada27e7ed8960.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23d7478de8e7971491d38e784529aff5.png)
您最近一年使用:0次
2024-05-08更新
|
1257次组卷
|
4卷引用:2024届青海省西宁市大通县高考四模数学(理)试卷
2023·全国·模拟预测
名校
5 . 如图1所示,四边形ABCD中
,
,
,
,
,M为AD的中点,N为BC上一点,且
.现将四边形ABNM沿MN翻折,使得AB与EF重合,得到如图2所示的几何体MDCNFE,其中
.
(1)证明:
平面FND;
(2)若P为FC的中点,求二面角
的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f571396be1aa4a8914a66f7d7abd6381.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d27bd71d79cb19eb554175e4ef0867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f8eeeea1c9652cacce976f8129cf520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72c4340dcffb0783d118a587e5352a2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7605ce6f221ce8cad191da0f84a216d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd2dcb2121af2b6d4ead458972439308.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/24/2f54442b-3ded-4f7d-a1d3-cfa199fb6ee6.png?resizew=344)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97f30533da2e1d2a958dc906c37eba9d.png)
(2)若P为FC的中点,求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0a3e7730e98d2af874d11664a5d084b.png)
您最近一年使用:0次
2023-11-22更新
|
1337次组卷
|
10卷引用:青海省西宁市2024届高三上学期期末联考数学(理)试题
青海省西宁市2024届高三上学期期末联考数学(理)试题(已下线)2024年普通高等学校招生全国统一考试理科数学领航卷(六)(已下线)2024年普通高等学校招生全国统一考试·信息卷理科数学(一)(已下线)2024年普通高等学校招生全国统一考试数学领航卷(八)(已下线)考点12 空间角 2024届高考数学考点总动员【练】宁夏石嘴山市平罗中学2023-2024学年高二上学期第三次月考数学试题(尖子班)吉林省辽源市田家炳高级中学校2023-2024学年高二上学期12月月考数学试题四川省成都市武侯高级中学2023-2024学年高二上学期12月月考数学试题福建省漳州市诏安县桥东中学(霞葛教学点)2024届高三上学期第二次月考数学试题(已下线)专题15 立体几何解答题全归类(9大核心考点)(讲义)-1
名校
6 . 如图,在四棱锥
中,
平面
,
,
,
,
,
,
为
的中点.
(1)证明:
;
(2)求二面角
的平面角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.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/34e0a957a55460c72673c0f2ee90dbb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bd6a2b112facda441f4e34bf5c145fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94d01872723102269f05c9d1b77c6e34.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1357ffcc86fb4d2dfcc57281b6054a6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3b10835116b9b777a666b438c907b49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/21/70396619-e122-4041-a16d-3c4940276501.png?resizew=157)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21f45265eaed2ba5fc08f6a112a02cd2.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/432b602bbaf82a4a40091ecfc8a8ffb0.png)
您最近一年使用:0次
2023-09-19更新
|
2192次组卷
|
8卷引用:青海省西宁市湟中区多巴高级中学2023-2024学年高二上学期第一次月考数学试题
名校
7 . 如图,在直角梯形
中,
,四边形
为平行四边形,平面
平面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/25/9858b829-f4fb-4dea-9585-e74135107d58.png?resizew=168)
(1)证明:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
平面
;
(2)若
,求二面角
的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d1750703a4d8ad6595e9ac955d27742.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32c05247f6998d7a70d31d13be4148c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb5a68a008a22d5a8cea5fe8dcf31e10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08fdcbfce42b0ec2fd0182d22c80db03.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/25/9858b829-f4fb-4dea-9585-e74135107d58.png?resizew=168)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895d6f710d5f67e1d4c7408d50d77281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c09afc70f448545336304333d5b5658b.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7b044c6d1ad421d20412af276d73f0f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/147310251a463539f66374c1f452fb67.png)
您最近一年使用:0次
2023-03-23更新
|
1452次组卷
|
4卷引用:青海省西宁市大通回族土族自治县2023届高三第二次模拟理科数学试题
名校
8 . 如图,在直三棱柱
中,
,点
是线段
的中点.请用空间向量的知识解答下列问题:
(1)求证:
;
(2)试求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3d25094ebc89022e064fc90f1baa0a1.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/2023/8/15/ec766767-3e9e-4f1d-a6b9-f47bcc430f2f.png?resizew=142)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba985fb50a9078a839b66bf1d1eadea9.png)
(2)试求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70a934f9c0e939f5f45fccfbe7ddf666.png)
您最近一年使用:0次
2023-08-15更新
|
623次组卷
|
5卷引用:青海省西宁市海湖中学2023-2024学年高二上学期第一次阶段考试数学试题
名校
9 . 如图,在四棱锥
中,平面
底面
,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/27/73513c62-b690-4ea7-bbbc-43d8ed238583.png?resizew=157)
(1)证明:
.
(2)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/93edc7bb513f40a89173121c8570cd65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c2d817d2506f0f2e4a9926f9ba761cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36d5fdc99dd2f51a7298c212745b7efc.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/27/73513c62-b690-4ea7-bbbc-43d8ed238583.png?resizew=157)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdfa54114f04a75b8c96165b3718ed7f.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
您最近一年使用:0次
2023-02-14更新
|
1040次组卷
|
5卷引用:青海省西宁市六校联考2022-2023学年高三下学期开学考试数学(理)试题
名校
10 . 如图,在三棱柱
中,
为边长为2的正三角形,D为
的中点,
,且
,平面
平面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/23/40bc791f-a3fd-4e66-a33e-e53aee3c4b57.png?resizew=181)
(1)证明:
;
(2)求二面角
的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92535536bd3c2761724fd058427f95a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/719de37e2bbf07a97de22f3353fabac1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50d9bdbbdfabc737323692c796e41930.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/23/40bc791f-a3fd-4e66-a33e-e53aee3c4b57.png?resizew=181)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/005c110169a6aa55414175b8e76fc9da.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f46340bfad3505ef24f4916a61dd1a5e.png)
您最近一年使用:0次
2023-02-19更新
|
363次组卷
|
3卷引用:青海省西宁市大通回族土族自治县2022-2023学年高三下学期开学摸底考试数学(理)试题