名校
1 . 如图,在正三棱柱
(侧棱垂直于底面,且底面是正三角形)中,
,M是棱
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/18/de5aa03f-9da3-43a4-997a-436b751887d1.png?resizew=156)
(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/50afc2594c05962ce8fe536bed9b6b31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f079b7586b1673522c3bd853ec9290.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/18/de5aa03f-9da3-43a4-997a-436b751887d1.png?resizew=156)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e812484073ca4a6fd647021fc72d57e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3e0dba5705e1d749cfb21ebbb2ed93.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9399c9a2a31b0e3165aea2d6ccc4f7c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/770b4f16694b2bd79a1a93d776a82680.png)
您最近一年使用:0次
2020-11-29更新
|
1447次组卷
|
7卷引用:安徽省淮南市第一中学2020-2021学年高二上学期期中数学(理)试题
安徽省淮南市第一中学2020-2021学年高二上学期期中数学(理)试题广东省深圳市翠园中学2020-2021学年高一下学期期中数学试题(已下线)第二章+点、直线、平面之间的位置关系(基础过关)-2020-2021学年高一数学单元测试定心卷(人教版必修2)湖南省常德市第二中学2020-2021学年高一下学期期末数学试题山西省山西大学附属中学校2022届高三上学期10月模块诊断数学(文)试题宁夏吴忠市2022届高三模拟数学(文)试题湖南省益阳市安化县2021-2022学年高二下学期期末联考数学试题
名校
2 . 如图,在斜三棱柱
中,点O.E分别是
、
的中点,
与
交于点F,
平![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99b16cff607cdc2d69afc70dc778acbb.png)
已知
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/17/5a3da2c0-0cd1-4a8f-b6a3-17d53c472252.png?resizew=198)
(1)求证:
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/0f1f229274a6e17977cc047814212589.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ee8456443402a25b1e25d35ff7e1c98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24bb49fdc6b6bbb2449fdf8a0de769d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ce03b310edce42191f9fa75a1c909ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99b16cff607cdc2d69afc70dc778acbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c90282d4a37c9a20620d4bbb0c263cae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a3cc9cccfb4c260dac05f4ed57e8c10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29ba708880f5eb782acbf2c961c2494c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/17/5a3da2c0-0cd1-4a8f-b6a3-17d53c472252.png?resizew=198)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57f9d682e5d3cc8573574d8d11636758.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc6184b191e6da43911e701121517e.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1f229274a6e17977cc047814212589.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8550fbd7938e0d8639462ac52a6dad1f.png)
您最近一年使用:0次
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3 . 在《九章算术》中,将底面为长方形且有一条侧棱与底面垂直的四棱锥称之为阳马.如图,四棱锥
为阳马,底面
为正方形,
底面
,则下列结论中错误的是( )
![](https://img.xkw.com/dksih/QBM/2020/10/25/2578660406353920/2580695623073792/STEM/c626bcd10b084c78a71206da8490a30e.png?resizew=158)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faeb97acf19bd3b2c6c77c2814df4d2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fb2e071d4e01107dcf7d95cbb86b415.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/2020/10/25/2578660406353920/2580695623073792/STEM/c626bcd10b084c78a71206da8490a30e.png?resizew=158)
A.![]() |
B.![]() ![]() |
C.![]() ![]() ![]() ![]() |
D.![]() ![]() ![]() ![]() |
您最近一年使用:0次
2020-10-28更新
|
1095次组卷
|
6卷引用:安徽省六安市皖西中学2020-2021学年高二上学期期中理科数学试题
名校
4 . 在三棱锥
中,
平面
,
,
,
,
是边
上的一动点,且直线
与平面
所成角的最大值为
,则三棱锥
的外接球的表面积为( )
![](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/cfb15541fa53381c9130217ccac69f97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e713f0ba80e87438cf6273fb00cb81a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/077c956ac0eb05cf120e14f17413dfa2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d88591679796c52024d11c4de641bdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2021-05-21更新
|
592次组卷
|
12卷引用:【全国百强校】安徽省黄山市屯溪第一中学2018-2019学年高二上学期期中考试数学(理)试题
【全国百强校】安徽省黄山市屯溪第一中学2018-2019学年高二上学期期中考试数学(理)试题山西省山西大学附属中学2018-2019学年高二上学期期中数学(理)试题山西省山西大学附属中学2018-2019学年高二上学期期中数学(文)试题【全国市级联】河南省洛阳市2018届高三第三次统一考试数学(理)试卷(已下线)2018年高考题及模拟题汇编 【理科】5.立体几何【全国百强校】山西省临汾第一中学2017-2018学年高二下学期期末考试数学(理)试题【全国百强校】湖南省长沙市长郡中学2019届高三下学期第六次月考数学(理)试题吉林省吉林市2020届高三第四次调研测试数学(理)试题山西省运城市景胜中学2020-2021学年高二上学期9月月考数学试题(已下线)专题4.3 立体几何的动态问题-玩转压轴题,进军满分之2021高考数学选择题填空题河南省郑州外国语学校2021-2022学年高三上学期调研考试三理科数学试题重点题型训练14:第6章 简单几何体的再认识-2020-2021学年北师大版(2019)高中数学必修第二册
名校
解题方法
5 . 线段
长为
,两端
,
分别在一个直二面角的两个面内,
和两个面所成角分别为
,
,那么
,
在棱上射影间的距离为( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/878e89b6eca35e34c863e832a2c661db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a97bb4dcfab4ec7539bc783d563c49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b86c22b670a8e9f3896f9e8883fbbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2020-06-26更新
|
84次组卷
|
3卷引用:安徽省阜阳市太和第一中学2020-2021学年高二(普通班)上学期期中数学试题
6 . 如图,三棱锥
中,平面
平面
,
,
,点
,
分别是棱
,
的中点,点
是
的重心.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/2/b5b95dfd-5051-4979-bea3-a3df84fa77c7.png?resizew=164)
(1)证明:
平面
;
(2)若
与平面
所成的角为
,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4aa9084b8fe0fe05c4388d1f835587b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63e4d19bf237a6fca67e0d01a9ddb726.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b88360883ff3aae1c331fab7ccf5b89.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/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89e8c3cf4bbfa6e00d38761560ddc6b4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/2/b5b95dfd-5051-4979-bea3-a3df84fa77c7.png?resizew=164)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c05952cdf83c61053d809ce3f4487e39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0e57a13c665af88f326c9890072bf73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e820aec9c1a975242fe6d76408a9cde8.png)
您最近一年使用:0次
2020-01-10更新
|
604次组卷
|
4卷引用:安徽省滁州市定远县育才学校2021-2022学年高三下学期期中考试数学(理)试题
解题方法
7 . 如图,在直三棱柱
中,
是
的中点.
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/2/982b0f98-9fba-4c3b-8d75-3ef8fa478177.png?resizew=137)
(Ⅰ)求直线
与平面
所成角的正弦值;
(Ⅱ)求二面角
的余弦值.
![](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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36c4559d27e3905980d1a4f1856f07de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/883fc5e3faf39829d60804b59deb1730.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92535536bd3c2761724fd058427f95a8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/2/982b0f98-9fba-4c3b-8d75-3ef8fa478177.png?resizew=137)
(Ⅰ)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24bb49fdc6b6bbb2449fdf8a0de769d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
(Ⅱ)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91441b6a208013fa5e8ddf7c8cd1f43d.png)
您最近一年使用:0次
名校
8 . 已知等腰直角三角形
,
,
分别是
的中点,沿
将
折起(如图),连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/18/a30ce8c9-d538-4a3a-be57-50410019ea36.png?resizew=350)
(Ⅰ)设点
为
中点,求证:
面
;
(Ⅱ)设
为
的中点,当
折成二面角
为
时,求
与面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f149e83812e72efd7dd3dfc78d0134ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91e1e4115d78e625e9e0f47cdade3286.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5881068127a39caf319492b4177204f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5881068127a39caf319492b4177204f0.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/18/a30ce8c9-d538-4a3a-be57-50410019ea36.png?resizew=350)
(Ⅰ)设点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b301c74bfd4824215e12ce4504cfec1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(Ⅱ)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/370148e9147aa25c60a07ab4ad46e83d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/260200d547998bcac50a4a491382e7f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f53330c107f8245290a5a42c3d356acd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
您最近一年使用:0次
2020-04-20更新
|
681次组卷
|
3卷引用:安徽省阜阳市太和第一中学2020-2021学年高二(奥赛班)上学期期中数学试题
9 . 如图所示,正方形
折成直二面角
,则
与面
所成角的余弦值为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/24/c78a43fd-049f-4501-811a-b77971b3d534.png?resizew=148)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/354a3c0d43f12fe4e5f1b5e224620a4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbb5672ffc5efe753f38a6191f8d2f4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/24/c78a43fd-049f-4501-811a-b77971b3d534.png?resizew=148)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
10 . 如图,四棱锥
中,底面
为菱形,
,平面
底面
,
是
上的一点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/8/e7ef9eaa-4172-42a5-b074-d0347e75fe38.png?resizew=149)
(1)证明:平面
平面
;
(2)若直线
平面
,且
,求直线
与平面
所成角的大小.
![](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/98e624e6ee68b796f70f9d35e78a8aed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d077f6da8b2c00b152d4679aa2ed7f7.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/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/8/e7ef9eaa-4172-42a5-b074-d0347e75fe38.png?resizew=149)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d077f6da8b2c00b152d4679aa2ed7f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65277734669566578cbb7d690bb200fb.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/373f735f0f04d11f1951eaef1bb78b6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65277734669566578cbb7d690bb200fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2ced8225ff27c8e3e1897b8629312d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21037e170bdbb322558e79c40c00b454.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
您最近一年使用:0次
2020-03-09更新
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140次组卷
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2卷引用:安徽省合肥市第十一中学2020-2021学年高二上学期期中数学(文)试题