20-21高二·全国·课后作业
解题方法
1 . 如图,四棱锥P-ABCD中,PA⊥平面ABCD,底面ABCD为直角梯形,∠ABC=∠BAD=90°,
.
问:在棱PD上是否存在一点E,使得CE//平面PAB?若存在,求出E点的位置;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5730ee74df7d277d066310385c62a2f8.png)
问:在棱PD上是否存在一点E,使得CE//平面PAB?若存在,求出E点的位置;若不存在,请说明理由.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/19/8d6c8867-0234-4f29-b94a-515ec3c4bd97.png?resizew=180)
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2 . 如图,在四棱锥
中,
平面
,底面
是直角梯形,其中
,
,
,
,E为棱
上的点,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/19/539de07f-0b4b-4cc1-9bcd-10da86d0f8a4.png?resizew=154)
(1)若F为棱
的中点,求证:
平面
;
(2)(i)求证
平面
;
(ii)设Q为棱
上的点(不与C,P重合),且直线
与平面
所成角的正弦值为
,求
的值.
![](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/f571396be1aa4a8914a66f7d7abd6381.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1134c8e3440abb6cd385af2c169037fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abfb2735e1683a6ae86b5b97a0032e4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00bab2c27eac56fffa4cd7dbe1dcdf1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b41744ec71119e7264ef9673a35805a8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/19/539de07f-0b4b-4cc1-9bcd-10da86d0f8a4.png?resizew=154)
(1)若F为棱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57f9d682e5d3cc8573574d8d11636758.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
(2)(i)求证
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8d2d217e9bcd059908f117dfc4d4259.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
(ii)设Q为棱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a253c7fdf589ee3dece13d5b5b5732.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf3d566704b44ea4ef1f99c37bd46902.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dee14db57f0c762aad845cf5b4a243c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2942447b6af4f2749668439d5ee03a7.png)
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4卷引用:北京市清华大学附属中学2020-2021学年高二上学期期末考试数学试题
北京市清华大学附属中学2020-2021学年高二上学期期末考试数学试题天津市耀华中学2022届高三暑假线上调研数学试题(已下线)专题02 空间向量与立体几何的典型题(二)-【尖子生专用】2021-2022学年高二数学考点培优训练(人教A版2019选择性必修第一册)(已下线)一轮复习大题专练50—立体几何(线面角2)—2022届高三数学一轮复习
解题方法
3 . 如图,在三棱锥
中,
底面
.点D,E,N分别为棱
的中点,M是线段
的中点,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/29/4a950e55-c57f-47d5-8d2c-ea4312f94609.png?resizew=201)
(Ⅰ)求证:
平面
;
(Ⅱ)求二面角
的正弦值;
(Ⅲ)已知点H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/a9177a42f9ab232822de2b889a572932.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55928df632fc6f2b88a44afe37e5a4e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/119d2453d9262756ef3be3b4b52a762c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/29/4a950e55-c57f-47d5-8d2c-ea4312f94609.png?resizew=201)
(Ⅰ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edcf19a7f0dd0cdf59516ae585025110.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34be4e71cabf458f17a6cd7f24bc70af.png)
(Ⅱ)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3f1c2d75dc63c9669f3b7b0e1a2ff4.png)
(Ⅲ)已知点H在棱
![](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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4 . 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)
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5 . 如图,正方形
边长为1,
平面
,
平面
,且
(
,
在平面
同侧),
为线段
上的动点.
![](https://img.xkw.com/dksih/QBM/2021/1/18/2638808354422784/2642328507834368/STEM/bbd7bebc-2cd6-4f07-aee5-0d10dca45333.png?resizew=268)
(1)求证:
;
(2)求
的最小值,并求取得最小值时二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7a38e6c6dfde2b19b6b47f35a439a06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1d3de310412c0fa445acd2cdb61513.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccc1ce55b1e716fa536a5ec300e2725f.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/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc56c77464a17a1e97b568762a3e2c6.png)
![](https://img.xkw.com/dksih/QBM/2021/1/18/2638808354422784/2642328507834368/STEM/bbd7bebc-2cd6-4f07-aee5-0d10dca45333.png?resizew=268)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e37a450636672d5a6b202d42aa3a1f51.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82392ad71d81c40b6c0f0f996dcc9fa6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93b7d5e5f6e97f716fb68cd628352a67.png)
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2021-01-23更新
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2卷引用:辽宁省大连市2020-2021学年高二上学期期末数学试题
解题方法
6 . 如图,在四棱锥
中,
,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/2021/1/22/2641740902203392/2641843068469248/STEM/a1a986474d744330b482cda46ce611e0.png?resizew=245)
(Ⅰ)求证:
平面
;
(Ⅱ)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/6037bba27008abc96a6dba99753549ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34e0a957a55460c72673c0f2ee90dbb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db27b7f29d7d01b2692f217bc3079fc4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cbb05b8b630052ff544249ebd72d95d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1074c943acd591413af464a28c285f05.png)
![](https://img.xkw.com/dksih/QBM/2021/1/22/2641740902203392/2641843068469248/STEM/a1a986474d744330b482cda46ce611e0.png?resizew=245)
(Ⅰ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/963a91995abd4927d75406d16e10a81f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
(Ⅱ)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
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7 . 以下命题正确的是( )
A.直线l的方向向量为![]() ![]() ![]() |
B.直线l的方向向量![]() ![]() ![]() ![]() |
C.两个不同平面![]() ![]() ![]() ![]() ![]() |
D.平面![]() ![]() ![]() ![]() ![]() ![]() ![]() |
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2020-12-04更新
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2198次组卷
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13卷引用:广东省普宁市第二中学2020-2021学年高二下学期第一次月考数学试题
广东省普宁市第二中学2020-2021学年高二下学期第一次月考数学试题辽宁省抚顺市第一中学2021-2022学年高二上学期入学考试数学试题人教B版(2019) 选修第一册 过关检测 模块综合把关卷广东省华中师范大学海丰附属学2021-2022学年高二上学期9月月考数学试题辽宁省抚顺市第一中学2021-2022学年高二上学期入学考试数学试题江苏省常州高级中学2020-2021学年高二上学期期中数学试题江苏省扬州中学2020-2021学年高二上学期12月月考数学试题广东省珠海市第二中学2022-2023学年高二上学期10月月考数学试题广西柳州市六校2022-2023学年高二上学期期中考试数学试题贵州省安顺市黄果树高级中学2022-2023学年高二上学期第一次月考数学试题辽宁省鞍山市矿山高级中学2022-2023学年高一下学期期末数学试题辽宁省鞍山市海城市牛庄高级中学等二校2022-2023学年高二上学期10月月考数学试题吉林省长春市农安县2023-2024学年高二上学期期中考试数学试题
名校
解题方法
8 . 已知平面
的一个法向量为
,
,则直线AB与平面
的位置关系为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee9be524094618c28db3ffbca08d4810.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d67c8b36d7657281a24befcfbf5cf5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
A.![]() | B.![]() | C.相交但不垂直 | D.![]() |
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2020-03-10更新
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8卷引用:人教A版(2019) 选修第一册 实战演练 第一章 课时练习 08 空间中直线、平面的垂直
人教A版(2019) 选修第一册 实战演练 第一章 课时练习 08 空间中直线、平面的垂直陕西省榆林市神木中学2020-2021学年高二下学期第一次月考理科数学试题福建省南平市2019-2020学年高二上学期期末数学试题(已下线)1.4.1+运用立体几何中的向量方法解决平行问题(基础练)-2020-2021学年高二数学十分钟同步课堂专练(人教A版选择性必修第一册)(已下线)3.4.1 运用立体几何中的向量方法解决平行问题(基础练)-2020-2021学年高二数学(理)十分钟同步课堂专练(人教A版选修2-1)(已下线)考点29 空间向量解决空间直线、平面位置关系-备战2021年新高考数学一轮复习考点一遍过江苏省盐城市滨海县五汛中学2021-2022学年高二下学期第一次月考数学试题(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)
解题方法
9 . 设
为平面
外的一条直线,
的方向向量为
,
的法向量为
,则对于下列结论,各选项说法正确的为( )
①若
,则
;②若
,则
;③设
与
所成的角为
,则
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/560ee2894ba8c5cee6633430cc8b3b41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36f1a8e551cba7ec9f451749f60e628d.png)
①若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33ee59964f020fc52b5ba66a3f5fcc3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87446a7f3d8663e3fa62157adcbe2835.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e380108ba2cf04e68a5a9393d2b921c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28d85a71b6985090505c3f01c541eb29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d891f5d68eec7e921b29ad70b1047fa1.png)
A.只有①正确 | B.只有②③正确 | C.只有①③正确 | D.①②③都正确 |
您最近一年使用:0次
2020-03-10更新
|
389次组卷
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2卷引用:天津市静海区大邱庄中学2021-2022学年高二上学期第一次诊断性检测数学试题
解题方法
10 . 平面
的一个法向量为
,直线
的一个方向向量为
,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd707b69a11f8de5566f23c1a2a9ff5a.png)
______ .
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4卷引用:人教A版(2019) 选修第一册 实战演练 第一章 课时练习 07 空间中直线、平面的平行
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