13-14高二上·福建·期末
名校
解题方法
1 . 在正方体ABCD-A1B1C1D1中,E是C1D1的中点,则异面直线DE与AC所成角的余弦值为( )
A.![]() | B.![]() |
C.![]() | D.![]() |
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2020-08-13更新
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15卷引用:专题06+立体几何-2021高考数学(理)高频考点、热点题型归类强化
(已下线)专题06+立体几何-2021高考数学(理)高频考点、热点题型归类强化(已下线)2012-2013学年福建省师大附中高二上学期期末考试理科数学试卷河南省商丘市九校2017-2018学年高二上学期期末联考数学(理)试题(已下线)第二章 空间向量与立体几何(基础过关)-2020-2021学年高二数学单元测试定心卷(北师大版选修2-1)重庆市缙云教育联盟2020-2021学年高一下学期期末数学试题广东省普宁市2019-2020学年高二上学期期中数学试题(已下线)第一章 (综合培优)空间向量与立体几何 B卷-【双基双测】2021-2022学年高二数学同步单元AB卷(人教A版2019选择性必修第一册)(已下线)1.4 空间向量的应用-2021-2022学年高二数学同步教与学全指导(学习导航+教学过程+课时训练)(人教A版2019选择性必修第一册)重庆市2021-2022学年高一下学期学业质量调研数学试题湖南省长沙市南雅中学2020-2021学年高二下学期入学适应性练习数学试题北京交通大学附属中学2022-2023学年高二上学期期中考试数学试题北京市昌平区首都师范大学附属回龙观育新学校2023-2024学年高二上学期10月月考数学试题四川省南充市阆中东风中学校2023-2024学年高二上学期第二次段考数学试题四川省南充市南部中学2023-2024学年高二上学期第二次月考数学试卷四川省宜宾市棠湖高级中学2023-2024学年高二上学期阶段测试三(12月月考)数学试题
2013·湖南怀化·一模
名校
解题方法
2 . 如图1,
,过动点
作
,垂足
在线段
上且异于点
,连接
,沿
将
折起,使
(如图2所示),
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/10/8677db1f-f0c3-418a-b98a-838b801c7750.png?resizew=334)
(1)当
的长为多少时,三棱锥
的体积最大;
(2)当三棱锥
的体积最大时,设点
分别为棱
的中点,试在棱
上确定一点
,使得
,并求
与平面
所成角的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8aa41b8cc912b518b764d1919ce14751.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b5f215a42c4b7078d8d65923eb9980e.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/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db5e1441a49e782ff0ef46e776cde06a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/587458141d890533c0c32aa249a27ad0.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/10/8677db1f-f0c3-418a-b98a-838b801c7750.png?resizew=334)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f48dc419adb17eb12220f07480b077b8.png)
(2)当三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f48dc419adb17eb12220f07480b077b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5889e1f093f2c35273d3132ef8434e4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cca04b2a2b61d62a809776670a60c09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5448218bd8c5b4f4a3714e0b0292d2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c4c865445dda4a59b6d5cb18fd74404.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/212a67f115d1cbe69f100b489babe5f8.png)
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2020-03-16更新
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7卷引用:押第19题立体几何-备战2021年高考数学临考题号押题(浙江专用)
(已下线)押第19题立体几何-备战2021年高考数学临考题号押题(浙江专用)(已下线)2013届湖南省怀化市高三第一次模拟考试理科数学试卷(已下线)2014届四川省雅安中学高三下学期3月月考理科数学试卷2016届吉林大学附中高三第二次模拟理科数学试卷贵州省遵义市遵义四中2018届高三第三次月考数学试题2019届湖北省武汉市新洲区部分高中高三上学期期末数学(理)试题湖南省岳阳市岳阳县第一中学2022-2023学年高二下学期入学考试数学试题
3 . 如图
,
是圆柱的上、下底面圆的直径,
是边长为2的正方形,
是底面圆周上不同于
两点的一点,
.
![](https://img.xkw.com/dksih/QBM/2017/9/19/1777177656385536/1777396726784000/STEM/784ff24931954655832ef26ab2b7b587.png?resizew=132)
(1)求证:
平面
;
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.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/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1364213f546b37f8764ddcb59e36ae4.png)
![](https://img.xkw.com/dksih/QBM/2017/9/19/1777177656385536/1777396726784000/STEM/784ff24931954655832ef26ab2b7b587.png?resizew=132)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/662698361c6b3ddaf0c28a3c87be53e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f332555e65843f32f4c623098c6adc72.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24db75f4d450674182ccfe3236aabdd3.png)
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2017-09-02更新
|
827次组卷
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4卷引用:2018年10月14日 《每日一题》一轮复习理数-每周一测
(已下线)2018年10月14日 《每日一题》一轮复习理数-每周一测贵州省贵阳市普通高中2018届高三8月摸底考试数学(理)试题贵州省遵义市南白中学2018届高三上学期第一次月考数学(理)试题西藏昌都市第一高级中学2021届高三上学期期末考试数学(理)试题
4 . 如图,在三棱锥
中,
底面
,
.点
,
,
分别为棱
,
,
的中点,
是线段
的中点,
,
.
平面
;
(2)求二面角
的正弦值;
(3)已知点
在棱
上,且直线
与直线
所成角的余弦值为
,求线段
的长.
![](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/9c06154cae3bf7a8ce5a1e97a7380875.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/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.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/487b14c446e989c68d0e148cc557dbf2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02438f0423acd0ff2dfa5ffb6abf143f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34be4e71cabf458f17a6cd7f24bc70af.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ff0b436dbab9a1ae8be06a1f36ed85d.png)
(3)已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff9d2abf13c2842f58654abf73c6b4ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b94ab384ee86aed107af8b3bbb1d13b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/826c728050e3378921442ace20269ef6.png)
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2017-08-07更新
|
9316次组卷
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20卷引用:2017-2018学年人教A版高中数学(理科)高三二轮专题13空间向量与立体几何测试
2017-2018学年人教A版高中数学(理科)高三二轮专题13空间向量与立体几何测试智能测评与辅导[理]-空间向量与立体几何(已下线)专题8.8 立体几何(单元测试)(测)【理】-《2020年高考一轮复习讲练测》专题11.8 空间向量与立体几何(练)-江苏版《2020年高考一轮复习讲练测》(已下线)专题17 立体几何综合-五年(2016-2020)高考数学(理)真题分项(已下线)专题09 立体几何(讲)-2021年高考数学二轮复习讲练测(文理通用)(理科)(已下线)专题22 盘点空间线面角的问题——备战2022年高考数学二轮复习常考点专题突破(已下线)专题24 空间向量与空间角的计算-十年(2011-2020)高考真题数学分项(已下线)专题23 立体几何解答题(理科)-3专题08立体几何与空间向量2017年全国普通高等学校招生统一考试理科数学(天津卷精编版)(已下线)单元测试君2017-2018学年高二理科数学人教版选修2-1(第03章 空间向量与立体几何)【全国百强校】四川省棠湖中学2017-2018学年高二零诊模拟数学(理)试题江苏省启东中学2019-2020学年高二上学期期初考试数学试题福建省泉州市晋江市南侨中学2019-2020学年高二上学期11月月考数学试题天津市静海区四校2020-2021学年高二上学期12月阶段性检测数学试题广西田东县田东中学2020-2021学年高二上学期期末测试数学(理)试题上海市奉贤区致远高级中学2021-2022学年高二上学期期末数学试题江苏省镇江市扬中市第二高级中学2021-2022学年高二下学期期中数学试题云南省大理白族自治州实验中学2021-2022学年高二下学期7月月考数学试题
5 . 如图,正方体
的边长为2,
,
分别为
,
的中点,在五棱锥
中,
为棱
的中点,平面
与棱
,
分别交于
,
.
(1)求证:
;
(2)若
底面
,且
,求直线
与平面
所成角的大小,并求线段
的长.
![](https://img.xkw.com/dksih/QBM/2014/6/20/1571782625320960/1571782630924288/STEM/5371d6860fdd4c2985d90e6d66f417e9.png?resizew=51)
![](https://img.xkw.com/dksih/QBM/2014/6/20/1571782625320960/1571782630924288/STEM/28cd28f95d1a4a8c9e4564a9c46f5494.png?resizew=16)
![](https://img.xkw.com/dksih/QBM/2014/6/20/1571782625320960/1571782630924288/STEM/dc1bbe151d8a4cf396fd7140673bc0ac.png?resizew=16)
![](https://img.xkw.com/dksih/QBM/2014/6/20/1571782625320960/1571782630924288/STEM/2ff003b0353e4b23bf3d9a2ba0d15a00.png?resizew=32)
![](https://img.xkw.com/dksih/QBM/2014/6/20/1571782625320960/1571782630924288/STEM/3dedf01b2202410ca2978591d0fdcf53.png?resizew=31)
![](https://img.xkw.com/dksih/QBM/2014/6/20/1571782625320960/1571782630924288/STEM/44bd1b7ce43d47c39fd54f6612882f46.png?resizew=84)
![](https://img.xkw.com/dksih/QBM/2014/6/20/1571782625320960/1571782630924288/STEM/7e2b053fdd614e27bc9c671105fe04ed.png?resizew=17)
![](https://img.xkw.com/dksih/QBM/2014/6/20/1571782625320960/1571782630924288/STEM/f2b9fc222e4b476eafcd71e15162bb5a.png?resizew=25)
![](https://img.xkw.com/dksih/QBM/2014/6/20/1571782625320960/1571782630924288/STEM/1e7ae17a1f9b4364a9e4d2a490f86ade.png?resizew=37)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://img.xkw.com/dksih/QBM/2014/6/20/1571782625320960/1571782630924288/STEM/09be45b411f0462cb7dda26fb34062d3.png?resizew=27)
![](https://img.xkw.com/dksih/QBM/2014/6/20/1571782625320960/1571782630924288/STEM/1d0b9eb5054143c9adb640525fc34672.png?resizew=17)
![](https://img.xkw.com/dksih/QBM/2014/6/20/1571782625320960/1571782630924288/STEM/e675f5504f424e548dee9d57b7cdbaa9.png?resizew=19)
(1)求证:
![](https://img.xkw.com/dksih/QBM/2014/6/20/1571782625320960/1571782630924288/STEM/c11885a458ab4031bf54ba9ae8adefc0.png?resizew=63)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://img.xkw.com/dksih/QBM/2014/6/20/1571782625320960/1571782630924288/STEM/e1178bc8f1784c53a390fd9400c665ee.png?resizew=59)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66b1a3078dc4803bd5e16833ddd459e0.png)
![](https://img.xkw.com/dksih/QBM/2014/6/20/1571782625320960/1571782630924288/STEM/fc7d94ecf9e3460182c1f7a229ba29f0.png?resizew=27)
![](https://img.xkw.com/dksih/QBM/2014/6/20/1571782625320960/1571782630924288/STEM/1e7ae17a1f9b4364a9e4d2a490f86ade.png?resizew=37)
![](https://img.xkw.com/dksih/QBM/2014/6/20/1571782625320960/1571782630924288/STEM/209e36a615a94c669b0e7eb2077439a3.png?resizew=29)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/29/97b7a5a2-ce3f-4f97-a65d-fc423673537e.png?resizew=182)
您最近一年使用:0次
2016-12-03更新
|
4336次组卷
|
2卷引用:北京十年真题专题07立体几何与空间向量
6 . 如图,四棱锥P-ABCD中,PA⊥平面ABCD,E为BD的中点,G为PD的中点,
,
,
,连接CE并延长交AD于F.
![](https://img.xkw.com/dksih/QBM/2014/5/22/1578311980425216/1578311980875776/STEM/9add0b5fac1d4e1aaed70bacac5509ba.png?resizew=189)
(1)求证:AD⊥平面CFG;
(2)求平面BCP与平面DCP的夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca7bee4046d91676e3da10a5ec6e5623.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50fdeedd0afce923be9b9ad4227fcebd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ab58dfbc740745c55839f2f43c1886b.png)
![](https://img.xkw.com/dksih/QBM/2014/5/22/1578311980425216/1578311980875776/STEM/9add0b5fac1d4e1aaed70bacac5509ba.png?resizew=189)
(1)求证:AD⊥平面CFG;
(2)求平面BCP与平面DCP的夹角的余弦值.
您最近一年使用:0次
2016-12-12更新
|
3721次组卷
|
2卷引用:沪教版(上海) 高三年级 新高考辅导与训练 第二部分 走近高考 第八章 向量高考题选
7 . 如图,在正四棱柱
中,
,点
是
的中点,点
在
上,设二面角
的大小为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/14/ecc003df-0555-41d9-9fa3-8c0dbbe54be4.png?resizew=123)
(1)当
时,求
的长;
(2)当
时,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c4e383b30741acd62fdeb962d773133.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea34000c1552bb3c58d3aeae2c089095.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/14/ecc003df-0555-41d9-9fa3-8c0dbbe54be4.png?resizew=123)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe902a56106060a5c6e74a9f8ebe027a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50df45f0e73865573ba49e4c4d5ed49a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db54223bb3fc2fe2497213a4d1f94827.png)
您最近一年使用:0次
2016-11-30更新
|
1640次组卷
|
10卷引用:专题11.8 空间向量与立体几何(练)-江苏版《2020年高考一轮复习讲练测》
专题11.8 空间向量与立体几何(练)-江苏版《2020年高考一轮复习讲练测》(已下线)考向35 空间向量及其运算和空间位置关系(重点)-备战2022年高考数学一轮复习考点微专题(新高考地区专用)2011年江苏省普通高中招生考试数学(已下线)第09讲 空间向量及其运算的坐标表示10种常见考法归类(2)(已下线)第二章 空间向量与立体几何(能力提升)-2020-2021学年高二数学单元测试定心卷(北师大版选修2-1)江苏省南京市金陵中学2020-2021学年高二下学期期初学情调研数学试题黑龙江省农垦宝泉岭高级中学2021-2022学年度高二学年上学期第一次月考数学试题(已下线)第一章 (基础过关)空间向量与立体几何 A卷-【双基双测】2021-2022学年高二数学同步单元AB卷(人教A版2019选择性必修第一册)(已下线)卷03 空间向量与立体几何-单元检测(难)-2021-2022学年高二数学单元卷模拟(易中难)(2019人教A版选择性必修第一册+第二册)沪教版(2020) 选修第一册 单元训练 第3章 空间向量在立体几何体中的应用(B卷)
真题
8 . 如图,在三棱锥
中,
,
为
的中点,
⊥平面
,垂足
落在线段
上.
![](https://img.xkw.com/dksih/QBM/2011/6/16/1570241646657536/1570241651785728/STEM/73484eb9-f305-4a6d-9cde-d7d20a1bb241.png)
(1)证明:
⊥
;
(2)已知
,
,
,
.求二面角
的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/047dc9795efa99b6fb9fdf9778085dab.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/ef49a3ca580a144cc65a609c167facc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://img.xkw.com/dksih/QBM/2011/6/16/1570241646657536/1570241651785728/STEM/73484eb9-f305-4a6d-9cde-d7d20a1bb241.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07140f277a35733d8c97577ccdd4e3ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0819cd060cdfb72896f379db29a4724.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b72d83915b41102495fcff91dbdbb0b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90bd1ffa355edcdc023b5a6b47ca7526.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e820aec9c1a975242fe6d76408a9cde8.png)
您最近一年使用:0次
解题方法
9 . 如图,平行四边形
所在平面与直角梯形
所在平面互相垂直,且
,
为
中点.
![](https://img.xkw.com/dksih/QBM/2015/7/27/1572194870935552/1572194877292544/STEM/50b01b9550a14087870ddccf306dcf66.png)
(1)求异面直线
与
所成的角;
(2)求平面
与平面
所成的二面角(锐角)的余弦值.
![](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/fc5e9ae00055f1c458d543d8c78b7fa7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eec951a1a2d763cf54749cc2c874b57c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://img.xkw.com/dksih/QBM/2015/7/27/1572194870935552/1572194877292544/STEM/50b01b9550a14087870ddccf306dcf66.png)
(1)求异面直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67d822262ff00915910e5b87d81ad1ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5adb5eb60ae4435a12d93854066298.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/134ef0b1a2669a09f05bd4dc2496f706.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
您最近一年使用:0次
2015-07-27更新
|
1837次组卷
|
3卷引用:考点26 空间向量求空间角(练习)-2021年高考数学复习一轮复习笔记