名校
1 . 如图,在三棱锥
中,
,
,
,
,
.
平面
;
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe7606b18420245c3c72479f57d4a833.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af260e0d98c95d1e092dc4c6d348e3ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea6ef3d1c748bb068d95efd3917b9b29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f4771888a9a52e8bb180c46e2e644b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05f3ac8676bb8a1b954e24c4ae2abd3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c5197adf1af97b29adc08417400807c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c745df4f226027778d5fe45b6501b822.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1269599d8f29c769773c8288e91b831.png)
您最近一年使用:0次
名校
解题方法
2 . 在如图所示的多面体
中,四边形
为菱形,在梯形
中,
,
,
,平面
平面
.
;
(2)若直线
与平面
所成的角为
,
为棱
上一点(不含端点),试探究
上是否存在一点
,使得平面
与平面
夹角的余弦值为
?若存在,求出
的长;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9165d9bfbb0f0d19eb482c2a4c1b29b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dde327febef2331a4766a79b433cc02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd3e927b7b2383ccded03838ae8b30b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ad6f8846d4294ae3789a6ddd17af5b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3e1d5146233a1c02370bea48615429b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c674dc5024374f53920947c4cf4baf11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a31a8e1321c1f5c9bc28c9164995187.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4734735213b599a9915e1ed91a5d8ce4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4734735213b599a9915e1ed91a5d8ce4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1140f1fbdeca9fd91d54dbfbeacb202.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56d266a04f3dc7483eddbc26c5e487db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
您最近一年使用:0次
2024-01-20更新
|
230次组卷
|
3卷引用:湖北省宜昌市部分省级示范高中2023-2024学年高二下学期期中考试数学试卷
名校
3 . 如图,在四棱锥
中,底面
为正方形,
底面
,
,点
为线段
的中点,点
为线段
上的动点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/28/547d5c8b-6f6e-4f71-ae8c-54ecb756edca.png?resizew=164)
(1)求证:平面
平面
.
(2)试确定点
的位置,使平面
与平面
所成的锐二面角为
.
![](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/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/829f9180ddd9aa1a0ee0dc520f4e0b5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/28/547d5c8b-6f6e-4f71-ae8c-54ecb756edca.png?resizew=164)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6501f1c913a4ef64957a2f01ab5baa15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
(2)试确定点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b03428a8f91a5674cb8f54766c165f7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ac09dc1ca2cdd7aef28c218763d3e4d.png)
您最近一年使用:0次
2023-11-26更新
|
154次组卷
|
12卷引用:湖北省宜昌市部分省级示范高中2023-2024学年高二上学期11月月考数学试卷
湖北省宜昌市部分省级示范高中2023-2024学年高二上学期11月月考数学试卷福建省福州市2019-2020学年高三上学期期末质量检测数学(理)试题2020届湖南省长沙市长望浏宁四县高三下学期4月联考理科数学试题广东省佛山市第一中学2022届高三上学期12月月考数学试题山东省实验中学2021-2022学年高三下学期3月诊断训练数学试题广西桂林、崇左、贺州、河池、来宾市2022届高三联合高考模拟考试数学(理)试题广东省揭阳市惠来县第一中学2021-2022学年高二下学期第一次段考数学试题广东省惠州市(惠阳中山中学、龙门中学、惠州仲恺中学)三校2023届高三上学期第一次质量检测数学试题福建省福州华侨中学2023届高三上学期第二次考试数学试题河南省南阳市第二中学校2022-2023学年高二上学期12月月考数学试题广东省韶关市广东北江实验学校2023-2024学年高二上学期第二次月考(12月)数学试题(已下线)模块三 专题4 大题分类练(立体几何)拔高能力练
4 . 如图1,四边形
是梯形,
,
,
是
的中点,将
沿
折起至
,如图2,点
在线段
上.
(1)若
是
的中点,求证:平面
平面
;
(2)若
,平面
与平面
夹角的余弦值为
,求直线
与平面
所成角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f79863ffcfa63117ca6741b20a48e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/badcb43042eb45f9966bd04908b1033b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7f9fba8a4098c1a0515286eb8d616dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15a424b50eaeafa6f302ffd95476cb86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fee9bc57f1a415b5790b5b40854c832e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6eb97aff0960e2640314888a38e7169c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/21/0876a4d9-082c-4105-8cda-de78cc769ed9.png?resizew=141)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/21/80393936-5bc4-41fa-99b3-9e3801e99649.png?resizew=147)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6eb97aff0960e2640314888a38e7169c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/675e62b42d5693606536cd993e8e74e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/719103f93166bab4828257608e641a9a.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbccb1ba0e436c5a3296955e8dd38853.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75b559200a2caa639355f7bc2ed8d37a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfe67036b4671b5d2a5c55b48c4d3bb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9868f77d5ab5073b6145f1c6d272122e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3533837e3d08c461dea031a44e5424d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35247dcbb6b93e8338e53b7b402fe99b.png)
您最近一年使用:0次
名校
解题方法
5 . 如图,在正四棱柱
中,
,
,点
,
,
,
分别在棱
,
,
,
上,
,
,
.
(1)证明:
;
(2)求
到平面
的距离;
(3)点
在棱
上,当二面角
为
时,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e55a2310cbba5e050488cd9296eb195d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3b9e816b14051f785aa5aae72b8eed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43a71fc9c0068109dad1382354570665.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f3ffe7abc59e2f65d827c8eab8d36a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c296e45b84cf67a98939aa7334e7d478.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22adbc0da438220f9cace11b629d799b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/777c6cf35158b0ecf7b6bd92de556cdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80de42aebe7de7021e3201a2622da469.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89e8c8d3c1ddb9b6d84eeffc331b9166.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/22/262e7fc7-f45c-4b8e-b4e1-a01c99edf527.png?resizew=130)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f200b422f272ffd4e96689bba77e68c.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a690150b96a634e5e5ea5f41cec394b5.png)
(3)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1da83bc459e069fc0d78d1aad4d37a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a8f3a8b0608ec011ad95c522fd2ea4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebeb0c6b3331994e6fced0e825d5638b.png)
您最近一年使用:0次
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解题方法
6 . 阅读材料:空间直角坐标系
中,过点
且一个法向量为
的平面
的方程为
,阅读上面材料,解决下面问题:已知平面
的方程为
,直线
是两平面
与
的交线,则直线
与平面
所成角的正弦值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5e336d6ca2cae3d6e6c3810d7e521a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/baf95be25d34a7366bf4060d081329c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9d84480e092a2d3788f029013388cb4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b523a8c1993478f6599680dc3b3dc45b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9cdf22b3f2ba07e0f15dedb85282458e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d429ec4c319b83bd606594e7d3a133b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32b6b86a637bc3c84d7b1916fb432dfc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2023-09-07更新
|
776次组卷
|
7卷引用:湖北省宜昌市部分省级示范高中2023-2024学年高二上学期11月月考数学试卷
名校
7 . 如图,在四棱锥
中,
平面
,
且
,
,
,
,
,
为
的中点.
(1)求证:
平面
;
(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/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.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/833cfda415649b832cc136caed392753.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c1ac2e11788860424508ea9e80cf89d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcc532cfe64300cb3da9e04a307c957a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/4/0efba4c7-dfea-4b9a-a8d7-8175d7f379b8.png?resizew=180)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a041e768d10a0d59d95e1bbef881261.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.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
2023-09-03更新
|
1453次组卷
|
10卷引用:湖北省宜昌市夷陵中学2020-2021学年高二下学期5月阶段性检测数学试题
湖北省宜昌市夷陵中学2020-2021学年高二下学期5月阶段性检测数学试题天津市红桥区2021届高三下学期二模数学试题江苏省南京市第十二中学2021-2022学年高三上学期8月线上月考数学试题安徽省合肥市第六中学2021-2022学年高二上学期10月单元教学评价数学试题(已下线)专题36 空间向量在立体几何中的应用-学会解题之高三数学万能解题模板【2022版】重庆南开(融侨)中学2022-2023学年高二上学期线上教学检测数学试题江西省宜春市第一中学2022-2023学年高二上学期期末考试数学试题北师大版(2019) 选修第一册 数学奇书 第三章 空间向量与立体几何 4.3 用向量方法研究立体几何中的度量关系 第2课时 空间中的距离问题江西省新干县第二中学2022-2023学年高二下学期3月月考数学试题安徽省蒙城县第二中学2023-2024学年高三上学期9月月考数学试题
名校
解题方法
8 . 如图1,直角梯形
中,
,
,
,
为
的中点,现将
沿着
折叠,使
,得到如图2所示的几何体,其中
为
的中点,
为
上一点,
与
交于点
,连接
.
(1)求证:
平面
;
(2)若三棱锥
的体积为
,求平面
与平面
的夹角
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3753faebdc15d2d2e598d5ffc4487a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a11029ca6b4b9e7f777af0280cf163c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63b43490ca09467a4c8cd8cfe91c94e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/321f96c4f808afe67cf565ca74ae0351.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cad4595d5352b2884568a59d8d766a4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/15/29a7c90b-252a-412e-949e-ae32a1670f89.png?resizew=366)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d3f076d3f5a78fc081c252e9a55d5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/065f7ff90e26ff382aa7b709955ad1b9.png)
(2)若三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/756c7e0b9eeb464d44f3196cafad0515.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf31876698721a199c7c53c6b320aa86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6734b2bef8750392d3c5c08b5d878505.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9a814b70236a108be5d6e7ff271fe92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
您最近一年使用:0次
2023-06-13更新
|
164次组卷
|
2卷引用:湖北省宜昌市葛洲坝中学2022-2023学年高二下学期5月月考数学试题
名校
解题方法
9 . 如图,在八面体
中,四边形
是边长为2的正方形,平面
平面
,二面角
与二面角
的大小都是
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/14/fe8d9bbe-f375-46b6-a58a-c8c3b43475fa.png?resizew=173)
(1)证明:平面
平面
;
(2)设
为
的重心,是否在棱
上存在点
,使得
与平面
所成角的正弦值为
,若存在,求
到平面
的距离,若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73cbd9eb22f75ad5304d8491b314a9a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b427c2978db0670dc4cb96bffea7e1cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee188333e1fa99417aede565c6a4a136.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47d294d69caac577339f11f477b2047e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79952a8632bfaa207f47d070e02d075b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b86c22b670a8e9f3896f9e8883fbbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83fcb97379ec606af9ea1e634063beb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/545e18836bc7fee22f8f813a6f525d93.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/14/fe8d9bbe-f375-46b6-a58a-c8c3b43475fa.png?resizew=173)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61c92f77ae9a673d79765013902c0f10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c606f78391198b6648ba0b92b60f8cf.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe51b50eca45db5d8ca5f4949c56d137.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30400f6b469089ca1d8f5e88353489e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad57bc4b04f28472154b7cfa9f2b09a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
您最近一年使用:0次
2023-04-13更新
|
1438次组卷
|
8卷引用:湖北省宜昌市宜都市第一中学2023-2024学年高二上学期期中数学试题
湖北省宜昌市宜都市第一中学2023-2024学年高二上学期期中数学试题重庆市2023届普高三模拟调研(三)数学试题(已下线)押新高考第20题 立体几何安徽省安庆市桐城中学2023届高三下学期第一次模拟数学试卷(已下线)第13讲 第一章 空间向量与立体几何 章节验收测评卷(提高卷)-【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)湖北省武汉市华中师范大学第一附属中学2023-2024学年高二上学期九月月考数学试题四川省成都市成都市第七中学2023-2024学年高二上学期10月月考数学试题湖北省恩施州四校联盟2023-2024学年高二上学期期中联考数学试题
名校
10 . 如图,在四棱锥
中,
,
,
,平面
平面
,E为
中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/27/3827fb6a-2db4-47aa-a2f5-aa10825c3a3f.png?resizew=186)
(1)求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
面
;
(2)点Q在棱
上,设
(
),若二面角
的余弦值为
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70371cb0063e591d64fd18c4da417f47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a11029ca6b4b9e7f777af0280cf163c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69a53c63c98d49f37fe40ee7063f0b2b.png)
![](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/bd33764ff4efddfe11a98a609753715c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/27/3827fb6a-2db4-47aa-a2f5-aa10825c3a3f.png?resizew=186)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895d6f710d5f67e1d4c7408d50d77281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
(2)点Q在棱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/249dc5045b2d6d1fc384e80293285df3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/540ccd15435aa2d59e809d6a28fb2467.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4341c2c59f80fefd2e2ee1bd949c80cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dee14db57f0c762aad845cf5b4a243c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
您最近一年使用:0次