1 . 如图,在四棱锥
中,
,
,
,E为棱
的中点,
平面
.
平面
;
(2)求证:平面
平面
;
(3)若二面角
的大小为
,求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef699f5dc072b853cfe700c6f1abbbae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a0e5697eca3f5205cb7b343648240bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/639bec6242a4b3f7bfb4b7033a67328c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.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/307807ee10071bafbe922eb18d2517d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9068f29d671d76d1e95ba3a4eaff5b96.png)
(2)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4aa9084b8fe0fe05c4388d1f835587b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f571a1aac46c6d0cf440c0ec2846bf9.png)
(3)若二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1636b4530c0b42d0e0b649e90e3b9e85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29e0c2455a9e796bba6861503f0fe31b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f571a1aac46c6d0cf440c0ec2846bf9.png)
您最近一年使用:0次
2024-04-23更新
|
5887次组卷
|
13卷引用:安徽省亳州市第一中学2023-2024学年高一下学期期中检测数学A卷
安徽省亳州市第一中学2023-2024学年高一下学期期中检测数学A卷安徽省亳州市第一中学2023-2024学年高一下学期期中检测数学B卷浙江省鄞州中学2023-2024学年高一下学期期中考试数学试题河南省信阳高级中学2023-2024学年高一下学期5月期中考试数学试题吉林省长春市第二中学2023-2024学年高一下学期第二次学程考试(6月)数学试题(已下线)第八章 立体几何初步(提升卷)-重难点突破及混淆易错规避(人教A版2019必修第二册)河北省保定市曲阳县第一高级中学2023-2024学年高一下学期5月月考数学试卷(已下线)6.5.2平面与平面垂直-【帮课堂】(北师大版2019必修第二册)浙江省杭州市西湖高级中学2023-2024学年高一下学期5月月考数学试题(已下线)【人教A版(2019)】高一下学期期末模拟测试A卷四川省广元市川师大万达中学2023-2024学年高一下学期5月月考数学试题黑龙江省哈尔滨市第一中学校2023-2024学年高一下学期第三次质量检测数学试题山东省淄博第四中学2023-2024学年高一下学期第三次学分认定检测数学试卷
名校
2 . 如图,矩形ABCD中,
,
,M为边CD的中点,将
沿直线AM翻折成
,且
,点P为线段BE的中点.
![](https://img.xkw.com/dksih/QBM/2022/5/28/2989030003204096/2989890806292480/STEM/039fe61fd6174451bddda312ccd21473.png?resizew=285)
(1)求证:
平面AME;
(2)求直线PC与平面ABM所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa7aeb2a8d1437eeb4482c3b6ad9f315.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7f9fba8a4098c1a0515286eb8d616dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e323c08b18488d11bd8f3cd74efa971a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75929268210da5976bc37d080da030dd.png)
![](https://img.xkw.com/dksih/QBM/2022/5/28/2989030003204096/2989890806292480/STEM/039fe61fd6174451bddda312ccd21473.png?resizew=285)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2597b5554284e275367c25529c6750f.png)
(2)求直线PC与平面ABM所成角的正弦值.
您最近一年使用:0次
2022-05-29更新
|
462次组卷
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4卷引用:安徽省宣城中学2021-2022学年高一下学期期中数学试题
安徽省宣城中学2021-2022学年高一下学期期中数学试题河北省邯郸市九校联盟2020-2021学年高一下学期期中数学试题(已下线)第九章立体几何专练16—翻折问题-2022届高三数学一轮复习河南省郑州市中牟县第一高级中学2022-2023学年高一下学期第三次月考数学试题
名校
3 . 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
2021·全国·模拟预测
4 . 如图所示,在四棱锥
中,
平面
,底面
为菱形,
,
,
分别为
,
的中点.
![](https://img.xkw.com/dksih/QBM/2021/3/17/2679720153645056/2683129971712000/STEM/6a88f787-c5cc-450c-a6b5-c252bef3ea5d.png?resizew=256)
(1)证明:
平面
;
(2)当
与平面
所成角为45°时,求二面角
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/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e075468e7fb0bf30229aec01a7205977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://img.xkw.com/dksih/QBM/2021/3/17/2679720153645056/2683129971712000/STEM/6a88f787-c5cc-450c-a6b5-c252bef3ea5d.png?resizew=256)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7592c4f01c8e06c7ee90df5b9413a9f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb97a871b6ed8467b659e23caa328507.png)
您最近一年使用:0次
名校
5 . 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
名校
6 . 如图,四边形
是圆柱
的轴截面,点
为底面圆周上异于
,
的点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/3/ed76d755-59bd-4f9e-86e4-8a642f81d1d5.png?resizew=212)
(1)求证:
平面
;
(2)若圆柱的侧面积为
,体积为
,点
为线段
上靠近点
的三等分点,是否存在一点
使得直线
与平面
所成角的正弦值最大?若存在,求出相应的正弦值,并指出点
的位置;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/192f4f9446c954a291f779d963f90257.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/3/ed76d755-59bd-4f9e-86e4-8a642f81d1d5.png?resizew=212)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c45fbffb9e2c7fa7c5006cde8da0cabe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
(2)若圆柱的侧面积为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e9fdc1f8ed0ae44b54a9a2a3aca2db4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86ebba6ed1add0fe647c0226614b9290.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd17a66a2af938c89e46f22e4d893b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84d454c82d9e52747563d47b68099249.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c54d01623f09f23103f03ba1135fc6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
您最近一年使用:0次
2020-08-10更新
|
1848次组卷
|
8卷引用:安徽省安庆市第一中学2021-2022学年高一下学期期中数学试题
安徽省安庆市第一中学2021-2022学年高一下学期期中数学试题安徽省合肥市庐江县2022-2023学年高一下学期7月期末教学质量抽测数学试题山东省烟台市2019-2020学年高一下学期期末考试数学试题山东省烟台市2019—2020学年度高一第二学期期末学业水平诊断数学试题(已下线)专题06 立体几何初步(难点)-2020-2021学年高一数学下学期期末专项复习(北师大版2019必修第二册)湖南省邵阳市武冈市第二中学2020-2021学年高一下学期第三次月考数学试题浙江省杭州市桐庐中学2020-2021学年高一下学期期末模拟数学试题重庆市南开中学校2021-2022学年高二下学期5月月考数学试题
名校
7 . 如图,在三棱柱
中,
平面
,
分别为
和
的中点.
![](https://img.xkw.com/dksih/QBM/2020/4/27/2450771658326016/2452885264826368/STEM/10b80da654e641298b173c66834f5ede.png?resizew=185)
(1)求证:
平面
;
(2)若
,求直线
与平面
所成的角.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71f2185273bf04c11118c7954f7ec822.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d4a70c6802a812c7118fa85eb7170a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24cfad1ba71a78d8f415335cde2f8c52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/2020/4/27/2450771658326016/2452885264826368/STEM/10b80da654e641298b173c66834f5ede.png?resizew=185)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7592c4f01c8e06c7ee90df5b9413a9f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20e4d2401dc178b704fe7c22fb222d67.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7945c3a6113cdee255b503c55850b81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.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,在四棱锥
中,
,
,
,
,
,
,
平面
,点
在棱
上.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/29/b14b0fe7-f7ae-43ff-a461-27034794e584.png?resizew=207)
(1)求证:平面
平面
;
(2)若
,求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f79863ffcfa63117ca6741b20a48e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55c24a968c73e960698a572ab01e3698.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecbb2dce15f3d0fe839688575d2a8ff8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/923718ac7b296dd2c3b5b1d8ea0c3b9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c83c3f76bc7569c3c088da98bb3b2c50.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21f9157fce2a8339d281178c7c0bccbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/29/b14b0fe7-f7ae-43ff-a461-27034794e584.png?resizew=207)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4aa9084b8fe0fe05c4388d1f835587b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e57d85dcecc700a41c1950733e45272.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9af29254fe60a392c249c5791279e9c8.png)
您最近一年使用:0次
2020-03-06更新
|
142次组卷
|
2卷引用:安徽省滁州市定远县民族中学2021-2022学年高三下学期期中考试数学(理)试题
名校
解题方法
10 . 如图,三棱锥
中,
平面
,
,
,点
,
分别为
,
的中点.
![](https://img.xkw.com/dksih/QBM/2020/2/20/2403306018299904/2404659340894208/STEM/3bd70ddb-c52d-4f40-a705-8bdfa348616d.png)
(1)求证:
平面
;
(2)
是线段
上的点,且
平面
.
①确定点
的位置;
②求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2ffc6952e988d04f22f0fb2f7f0ab7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a30b62bac36c4761cf9441873e309250.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65fc998d33cdf37c272f79cfd64b7b99.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/2020/2/20/2403306018299904/2404659340894208/STEM/3bd70ddb-c52d-4f40-a705-8bdfa348616d.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d0edb1508fc95765f3bb316bcb5252d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ac480d8d9d7821b62a603cf5cfda236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3d47802d866e5cf64808fb34f9af601.png)
①确定点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
②求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
您最近一年使用:0次
2020-02-22更新
|
669次组卷
|
2卷引用:安徽省合肥市庐阳区第一中学2019-2020学年高二上学期期中数学(理)试题