名校
解题方法
1 . 如图,在三棱柱
中,
平面
,
,
,
分别是
的中点
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/12/2c97a700-33ee-4717-ab9c-15eff9369789.png?resizew=199)
(1)求直线
与平面
所成角的正弦值;
(2)在棱
上是否存在一点
,使得平面
与平面
的夹角的余弦值为
?若存在,求出
点的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5845ccc0d735dc14c92a8926d9b1def6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29ba708880f5eb782acbf2c961c2494c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ed8f7d3d7043d4b1eb98fc5c4e2fcd3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91e1e4115d78e625e9e0f47cdade3286.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/450176ba93397527fc3520c55dd1476a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/12/2c97a700-33ee-4717-ab9c-15eff9369789.png?resizew=199)
(1)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8772aa893a9c1d40f714cb25701701.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/923189afc198d153c79059a827f63c87.png)
(2)在棱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/923189afc198d153c79059a827f63c87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6595f862f1b3dfc3e8ec0331c8cc9ed6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
您最近一年使用:0次
2021-11-12更新
|
975次组卷
|
3卷引用:新疆师范大学附属中学2020-2021学年高二12月月考数学(理)试题
名校
解题方法
2 . 如图,直三棱柱
的侧面
为矩形,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/14/23997beb-41bf-456a-a3e3-94d5e9f4e633.png?resizew=160)
(1)求证:平面
平面
;
(2)设
为
的中点,求平面
与平面
所成锐角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ac61c24f99a4e466f1e2ea011893866.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebe236a434aa88e5633ea61574d1bed8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb5b12692517a39c320f99a479eb055.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/14/23997beb-41bf-456a-a3e3-94d5e9f4e633.png?resizew=160)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/140088b0cb73812aa9d523c44559298a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b94e97d085cea077cb82a0b7d2f523e.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea848cd2aa3a464618020475097949fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73845d4d663b3de0b281611fe2c762fe.png)
您最近一年使用:0次
2021-09-09更新
|
960次组卷
|
2卷引用:四川省成都市蒲江县蒲江中学2020年高三上学期11月月考数学(理)试题
3 . 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
名校
解题方法
4 . 在空间中,已知平面α过(3,0,0)和(0,4,0)及z轴上一点(0,0,a)(a>0),如果平面α与平面xOy的夹角为45°,则a=________ .
您最近一年使用:0次
2021-09-14更新
|
938次组卷
|
16卷引用:黑龙江省哈尔滨市宾县一中2019-2020学年高二上学期第二次月考数学(理)试卷
黑龙江省哈尔滨市宾县一中2019-2020学年高二上学期第二次月考数学(理)试卷(已下线)[新教材精创] 1.4.2 用空间向量研究距离、夹角问题(2) B提高练-人教A版高中数学选择性必修第一册人教A版(2019) 选择性必修第一册 必杀技 第一章 空间向量与立体几何 第1.4节综合训练人教B版(2019) 选择性必修第一册 必杀技 第一章 空间向量与立体几何 第1.2节综合训练(已下线)【新教材精创】1.2.4+二面角(1)B提高练-人教B版高中数学选择性必修第一册(已下线)第3讲 用空间向量研究距离、夹角问题-2021-2022学年高二数学上学期高频考点专题突破(人教A版2019选择性必修第一册)北师大版(2019) 选修第一册 必杀技 第三章 §4 综合训练(已下线)专题1.10 空间向量的应用-重难点题型检测-2021-2022学年高二数学举一反三系列(人教A版2019选择性必修第一册)沪教版(2020) 选修第一册 精准辅导 第3章 3.4(4)求角的大小(第2课时)辽宁省沈阳市第一二〇中学2022-2023学年高二上学期第一次质量检测数学试题湖南省郴州市2022-2023学年高二上学期期末教学质量监测数学试题人教A版(2019) 选修第一册 数学奇书 第一章 学业评价(十)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 1.4.2 用空间向量研究距离、夹角问题 第2课时 用空间向量研究夹角问题(已下线)1.4.2 用空间向量研究距离、夹角问题【第一课】(已下线)第一章 空间向量与立体几何(单元基础卷)-【满分全攻略】2023-2024学年高二数学同步讲义全优学案(人教A版2019选择性必修第一册)(已下线)期末真题必刷基础60题(31个考点专练)【满分全攻略】2023-2024学年高二数学同步讲义全优学案(人教A版2019选择性必修第一、二册)
名校
5 . 如图,在四棱锥
中,面
面
,
且
,
为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/28/47088220-3a5c-404d-a9ea-488fb3768e6c.png?resizew=187)
(1)求证:
平面
;
(2)求平面
与平面
所成锐二面角的余弦值;
(3)在线段
上是否存在一点
,使得直线
与平面
所成角的正弦值为
,若存在,求出
的值;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4aa9084b8fe0fe05c4388d1f835587b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e3db19de1215bb461b1ab53f312a505.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ad86c49a796d29568ba9ab42ace4a1f.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/2022/11/28/47088220-3a5c-404d-a9ea-488fb3768e6c.png?resizew=187)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/250833a6c405ffd724b673b478c22919.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)
(3)在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db54223bb3fc2fe2497213a4d1f94827.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585a36dc7fe184aa99338bb2ecf1b7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/241a37fb1eff68a7133822b1b52d627e.png)
您最近一年使用:0次
解题方法
6 . 在如图所示的几何体中,
均为等边三角形,且平面
平面
,平面
平面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/5/dce9b9c1-6a0a-4572-8d28-6eee4b7c75ff.png?resizew=150)
(1)证明:
.
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5337198d46a7c109b3552ce3843668fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8dc6db50a9709c3f4d84eee7bdf1250.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c309e58bf083bad13abd549720a63a22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/5/dce9b9c1-6a0a-4572-8d28-6eee4b7c75ff.png?resizew=150)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebe7eaf967808dad0a184eeedfa27721.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da0f73cf7ab0c2a8a0099cb2873c81f4.png)
您最近一年使用:0次
解题方法
7 . 在正方体ABCD—A1B1C1D1中,异面直线
和
分别在上底面A1B1C1D1和下底面ABCD上运动,且
,若
与
所成角为60°时,则
与侧面ADD1A1所成角的大小为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/057cdb4057bca398a838e868efd360f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10d8eb4a9f462ca0c1d49c3fe91e720d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
A.30° | B.45° | C.60° | D.90° |
您最近一年使用:0次
2020-10-03更新
|
1524次组卷
|
6卷引用:河南省名校联盟2020-2021学年高三9月质量检测数学文科试题
河南省名校联盟2020-2021学年高三9月质量检测数学文科试题(已下线)专题8.7 立体几何中的向量方法(精练)-2021年新高考数学一轮复习学与练吉林省通榆县第一中学2020-2021学年高三上学期第四次质量检测数学(文)试题贵州省贵阳为明教育集团2021届高三第一次调研理科数学试题人教A版(2019) 选修第一册 实战演练 第一章 验收检测(已下线)专题 1.2空间向量:求距离与角度13种题型归类(2)
8 . 如图,在直三棱柱
中,点
、
分别为
和
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/27/dc67479f-01e4-4abd-8307-1cf201bdd9ea.png?resizew=201)
(1)证明:
平面
;
(2)若
,
,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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/27/dc67479f-01e4-4abd-8307-1cf201bdd9ea.png?resizew=201)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/063510e3c1fb6a7ccc3b8e3e3c7d660e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3e0dba5705e1d749cfb21ebbb2ed93.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14d355b4c58b4e883b9e65cc6da8622e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98e384e0ffc3d599303b77ee2a12221e.png)
您最近一年使用:0次
2020-09-25更新
|
932次组卷
|
3卷引用:广西玉林市田家炳中学2020-2021学年高二上学期质量检测数学试题
名校
解题方法
9 . 如图:正方体
,
为棱
的中点.
![](https://img.xkw.com/dksih/QBM/2021/1/16/2637244435095552/2639719886012416/STEM/06e6ed28-25bc-430c-9c69-fda7926a8bac.png)
(1)求直线
与直线
所成角的余弦值;
(2)在棱
上是否存在一点
,满足
?若存在,请指出点
的位置;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f66fb71b75b63594ebeeeebd1963eed5.png)
![](https://img.xkw.com/dksih/QBM/2021/1/16/2637244435095552/2639719886012416/STEM/06e6ed28-25bc-430c-9c69-fda7926a8bac.png)
(1)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fe734023d4e70010a6b2cc3267cb86e.png)
(2)在棱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df906f75dbbe3a7537e0427c33af700f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
您最近一年使用:0次
2021-01-19更新
|
757次组卷
|
3卷引用:辽宁省锦州市2020-2021学年高二上学期期末考试数学试题
解题方法
10 . 如图,在三棱锥
中,
,
,
分别为棱
,
,
的中点.已知
,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/26/3f534203-fe09-4dd5-b4da-b465d33c5f6c.png?resizew=132)
(1)证明:平面
平面
;
(2)若
,
,
为
中点,求
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/8455657dde27aabe6adb7b188e031c11.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/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0d9ef979b9f27a28cbda6923e888ccc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/967f74b8993c61634ceed95edca05ffd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0402dd5ae3db10281f9f1e11738bcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aeedb5f361a1baff6338436fff6c471d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/26/3f534203-fe09-4dd5-b4da-b465d33c5f6c.png?resizew=132)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4aa9084b8fe0fe05c4388d1f835587b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb5b12692517a39c320f99a479eb055.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/615fc8790237a1b09af51d6bcad6b595.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/892909e49156f7dcc0650fcd65243877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
您最近一年使用:0次
2020-09-05更新
|
945次组卷
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2卷引用:新高考课改专家2021届高三数学命题卷试题