1 . 如图,三棱柱
,侧面
底面
,侧棱
,
,
,点
、
分别是棱
、
的中点,点
为棱
上一点,且满足
,
.
平面
;
(2)求证:
;
(3)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/7d0c892fa3699be6f3b91013c644e773.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41fd676c41d2d644928f014b0fea4689.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3d2fc1ae143960a13e51a726af81b71.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a9f99fb3252a4b3b7a62e8a675ddce9.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/53e97fcdcfd6183b976a61ef3222c607.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c25569b0e6d9746351f57fac965d41d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f0f1bf21012b7c08ae25facbba1746b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57f9d682e5d3cc8573574d8d11636758.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e56da39a7265af0f8ce18dc202ffac92.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/baa847b323caebbd284f2a34be0235b5.png)
(3)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b7d857811cbd619f868d951aa7a0ab8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f7d5479a36ebe68504c92743154644f.png)
您最近一年使用:0次
2021-09-11更新
|
3009次组卷
|
5卷引用:8.5.1 直线与直线平行(分层作业)-【上好课】2022-2023学年高一数学同步备课系列(人教A版2019必修第二册)
(已下线)8.5.1 直线与直线平行(分层作业)-【上好课】2022-2023学年高一数学同步备课系列(人教A版2019必修第二册)(已下线)8.6.1直线与直线垂直(分层作业)-【上好课】天津市四校联考2020-2021学年高一下学期期末数学试题(已下线)第8章 立体几何初步(典型30题专练)-2021-2022学年高一数学考试满分全攻略(人教A版2019必修第二册)新疆生产建设兵团第二中学2021-2022学年高一下学期期末考试卷数学试题
名校
2 . 如图在三棱锥P-ABC中,平面PAB⊥平面PBC,PB⊥BC,PD=DB=BC=AB=AD=2.
![](https://img.xkw.com/dksih/QBM/2021/9/3/2800036107902976/2801395416547328/STEM/bc8e1bc7-54a6-4ea9-8ad0-2e47501d2c75.png?resizew=198)
(1)证明:PA⊥平面ABC;
(2)求二面角B-AD-C的余弦值.
![](https://img.xkw.com/dksih/QBM/2021/9/3/2800036107902976/2801395416547328/STEM/bc8e1bc7-54a6-4ea9-8ad0-2e47501d2c75.png?resizew=198)
(1)证明:PA⊥平面ABC;
(2)求二面角B-AD-C的余弦值.
您最近一年使用:0次
2021-09-05更新
|
1545次组卷
|
4卷引用:2021年全国高考甲卷数学(理)试题变式题16-20题
(已下线)2021年全国高考甲卷数学(理)试题变式题16-20题(已下线)2021年全国高考甲卷数学(理)试题变式题16-20题安徽省名校联盟2021-2022学年高三上学期开学考试理科数学试题海南省琼海市嘉积中学2021-2022学年高一下学期期末数学试题
3 .
为四棱锥
的棱
的三等分点,且
.点
在
上,
,四边形
为平行四边形.若
四点共面,求实数
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43e137acaa430634bb334261a15fe664.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/826c728050e3378921442ace20269ef6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b5066e939e66307d8e8f004ce6cc490.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/738d97ccf6e95aabda8038aa2b30da07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
2021-09-01更新
|
999次组卷
|
5卷引用:第一章 空间向量与立体几何(基础、典型、新文化、压轴)分类专项训练-2022-2023学年高二数学考试满分全攻略(人教A版2019选择性必修第一册)
(已下线)第一章 空间向量与立体几何(基础、典型、新文化、压轴)分类专项训练-2022-2023学年高二数学考试满分全攻略(人教A版2019选择性必修第一册)(已下线)专题01 空间向量及其运算压轴题(5类题型+过关检测)-【常考压轴题】2023-2024学年高二数学上学期压轴题攻略(人教A版2019选择性必修第一册)1.1.1空间向量及其线性运算(基础知识+基本题型)-【一堂好课】2021-2022学年高二数学上学期同步精品课堂(人教A版2019选择性必修第一册)北师大版(2019) 选修第一册 突围者 第三章 第三节 课时1 空间向量基本定理沪教版(2020) 选修第一册 精准辅导 第3章 3.2 空间向量基本定理
解题方法
4 . 如图,在直四棱柱ABCD—A1B1C1D1中,底面ABCD为等腰梯形,AB
CD,AB=4,CD=2,E,E1,F分别是棱AD,AA1,AB的中点.证明:直线EE1
平面FCC1.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895d6f710d5f67e1d4c7408d50d77281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895d6f710d5f67e1d4c7408d50d77281.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/26/e5d6b99d-2af5-4bb1-bbf2-89a2a30e0739.png?resizew=152)
您最近一年使用:0次
2021-09-01更新
|
514次组卷
|
5卷引用:6.1.3 共面向量定理-【题型分类归纳】2022-2023学年高二数学同步讲与练(苏教版2019选择性必修第二册)
(已下线)6.1.3 共面向量定理-【题型分类归纳】2022-2023学年高二数学同步讲与练(苏教版2019选择性必修第二册)人教A版(2019) 必修第二册 过关斩将 第八章 8.5. 空间直线、平面的平行 8.5.2 直线与平面平行人教B版(2019) 必修第四册 过关斩将 第十一章 立体几何初步 11.3.2 直线与平面平行(已下线)1.1.1空间向量及其线性运算(同步练习)-【一堂好课】2021-2022学年高二数学上学期同步精品课堂(人教A版2019选择性必修第一册) 北师大版 必修2 过关斩将 第一章 立体几何初步 §5 平行关系 5.1 平行关系的判定
名校
5 . 如图,在直三棱柱
中,
,且
,
是
,
的交点,
是
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/2/262f1e48-8968-4cf0-bd37-d8adc4296db6.png?resizew=247)
(1)求证:
平面
;
(2)求平面
与平面
夹角的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/615fc8790237a1b09af51d6bcad6b595.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e96a6b20a35af7755e5d90789ea862da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b470c4e195cf7a07b7a331ce4b436e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e26d9636ad77369535852c6e4493446a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/2/262f1e48-8968-4cf0-bd37-d8adc4296db6.png?resizew=247)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93cf663ee2bf1ac5c43f4306fa0cf250.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9afac7c616bbb14e1ed428a3c507c7dc.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ef671ff46a372d5351b8c2f9eb26b48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9afac7c616bbb14e1ed428a3c507c7dc.png)
您最近一年使用:0次
20-21高二·全国·课后作业
解题方法
6 . 在如图所示的多面体中,EF⊥平面AEB,AE⊥EB,AD∥EF,EF∥BC,BC=2AD=4,EF=3,AE=BE=2,G是BC的中点,求证:AB∥平面DEG.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/10/1a686540-c2be-4f0e-b1d1-c6bb30ea6b12.png?resizew=168)
您最近一年使用:0次
2021-08-27更新
|
502次组卷
|
4卷引用:6.3.1&6.3.2 直线的方向向量与平面的法向量、空间线面关系的判定-【题型分类归纳】2022-2023学年高二数学同步讲与练(苏教版2019选择性必修第二册)
(已下线)6.3.1&6.3.2 直线的方向向量与平面的法向量、空间线面关系的判定-【题型分类归纳】2022-2023学年高二数学同步讲与练(苏教版2019选择性必修第二册)(已下线)第八课时 课中 1.4.1.2 空间中直线、平面的平行(已下线)专题09 空间向量与平行关系(重点突围)-【学霸满分】2022-2023学年高二数学下学期重难点专题提优训练(苏教版2019选择性必修第二册)人教A版(2019) 选修第一册 数学奇书 第一章 空间向量与立体几何 1.4.1 用空间向量研究直线?平面的位置关系 第2课时 空间中直线?平面的平行
7 . 如图,四棱锥
中,侧棱
面
,
,点
在线段
上,且
,
为
的中点,
,
面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/28/b91d7ee6-47d9-41f2-a406-314be5e8ac02.png?resizew=188)
(Ⅰ)求
的长;
(Ⅱ)若
,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/9ae635f678849f902970e6a6374f1c8e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a23db69ae2e259276878d63a9df8d3bd.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/34e0a957a55460c72673c0f2ee90dbb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edcf19a7f0dd0cdf59516ae585025110.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/28/b91d7ee6-47d9-41f2-a406-314be5e8ac02.png?resizew=188)
(Ⅰ)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b80ee363635d73f601654339028daec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7da6442178194128ffb0937476cd38d.png)
您最近一年使用:0次
解题方法
8 . 如图,已知四边形ABCD是空间四边形,E是AB的中点,F、G分别是BC、CD上的点,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/14/2311e830-bd65-4c8b-ba9f-50c2b1da1f8a.png?resizew=171)
(1)设平面EFG∩AD=H,AD=λAH,求λ的值
(2)试证明四边形EFGH是梯形.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/834bd066d0804d5dfd6fc3ec962184cb.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/14/2311e830-bd65-4c8b-ba9f-50c2b1da1f8a.png?resizew=171)
(1)设平面EFG∩AD=H,AD=λAH,求λ的值
(2)试证明四边形EFGH是梯形.
您最近一年使用:0次
2021-08-23更新
|
502次组卷
|
3卷引用:考点31 直线、平面平行的判定及其性质-备战2022年高考数学一轮复习考点帮(浙江专用)
(已下线)考点31 直线、平面平行的判定及其性质-备战2022年高考数学一轮复习考点帮(浙江专用)安徽省六安市舒城育才学校2020-2021学年高一下学期5月月考文科数学试题安徽省六安市舒城育才学校2020-2021学年高一下学期5月月考理科数学试题
名校
9 . 如图,在四棱锥
中,
平面
,
,
,
,
为
中点,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/12/18b9bac0-d4de-4d6c-9b69-747b73fead9c.png?resizew=233)
(1)求证:BC//平面
;
(2)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/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52a923784f083b7f4777891afe06b44e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f8eeeea1c9652cacce976f8129cf520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c14a66ed4bd66df65bc42c4ac1ed15c.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/7aa1162d5481e2441fe5bc0d49a576b0.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/12/18b9bac0-d4de-4d6c-9b69-747b73fead9c.png?resizew=233)
(1)求证:BC//平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
您最近一年使用:0次
2021-08-16更新
|
1295次组卷
|
4卷引用:一轮复习大题专练49—立体几何(线面角1)—2022届高三数学一轮复习
(已下线)一轮复习大题专练49—立体几何(线面角1)—2022届高三数学一轮复习北京市延庆区2020-2021学年高二下学期期末考试数学试题北京市第二十二中学2022届高三上学期期中数学试题四川省宜宾市叙州区第一中学校2022-2023学年高二下学期期中理科数学试题
解题方法
10 . 如图,四棱锥
的底面是平行四边形,平面
⊥平面
,且△
是正三角形,点
是
的中点,点
,
分别在棱
,
上.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/15/14e00783-6ade-499a-99ec-eb79b2550012.png?resizew=234)
(1)求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3e126c16032892966489053f44b9048.png)
;
(2)若
,
,
,
共面,求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb31ef428bd9de9bc875b343feded3c7.png)
;
(3)在侧面
中能否作一条直线段使其与平面
平行?如果能,请写出作图的过程并给出证明;如果不能,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/218054144a13435580cd132b9459546c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/218054144a13435580cd132b9459546c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.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/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/15/14e00783-6ade-499a-99ec-eb79b2550012.png?resizew=234)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3e126c16032892966489053f44b9048.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
(2)若
![](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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb31ef428bd9de9bc875b343feded3c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(3)在侧面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1879cd22c769c81e5f3166c49f13a508.png)
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