1 . 如图,在正方体
中,
,
为棱
的中点,
是正方
内部(含边界)的一个动点,且
∥平面
,
(1)求动点
的轨迹长度
(2)求平面
与平面
夹角的正切值
![](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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22adbc0da438220f9cace11b629d799b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82b724168afaee2ecddf97257180be18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fc725182c2fd1413319fea35b95c7dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/923189afc198d153c79059a827f63c87.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/14/a40107fa-d6a9-4ac2-acbf-1964d888ef0d.png?resizew=167)
(1)求动点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/923189afc198d153c79059a827f63c87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
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解题方法
2 . 中和殿是故宫外朝三大殿之一,位于紫禁城太和殿与保和殿之间,中和殿建筑的亮点是屋顶为单檐四角攒尖顶,体现天圆地方的理念,其屋顶部分的轮廓可近似看作一个正四棱锥.若该四棱锥的侧棱长为
米,且这个四棱锥的体积为
立方米,则该四棱锥的侧面与底面所成锐二面角的大小为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71f77eb2caf347f0c081e7968fec2a22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ca0378463b264a6641c565cb205d884.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/15/2b49c198-426f-4712-a9a4-ce699a7df831.png?resizew=172)
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名校
解题方法
3 . 十二水硫酸铝钾是一种无机物,又称明矾,是一种含有结晶水的硫酸钾和硫酸铝的复盐.我们连接一个正方体各个面的中心,可以得到明矾晶体的结构,即为一个正八面体
(如图).假设该正八面体的所有棱长均为2,则二面角
的余弦为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94db528f0e99604cac52a2d82b7d9146.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f6c670d0c1af15e4c1ef45d157c89bb.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/12/c951180d-045a-4b8c-a12e-f2506fdb3c11.png?resizew=205)
A.![]() | B.![]() |
C.![]() | D.![]() |
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2023-07-10更新
|
382次组卷
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7卷引用:湖南省岳阳市湘阴县2022-2023学年高一下学期7月期末数学试题
湖南省岳阳市湘阴县2022-2023学年高一下学期7月期末数学试题湖南省益阳市桃江县第一中学2023-2024学年高二上学期入学考试数学试题(已下线)第三篇 以学科融合为新情景情境2 跨不同学科融合(已下线)10.4 平面与平面间的位置关系(第2课时)(九大题型)(分层练习)-2023-2024学年高二数学同步精品课堂(沪教版2020必修第三册)温德克英联盟湖北部分县市地区普通高中2023-2024学年高二上学期11月期中综合性选拔考试数学试题(已下线)核心考点7 立体几何中角和距离 A基础卷 (高一期末考试必考的10大核心考点)(已下线)【高一模块一】难度6 小题强化限时晋级练 (中等3)
解题方法
4 . 如图,在四棱锥
中,底面
为正方形,
面
为棱
上一动点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/8/d1722480-b69d-4b20-93a4-be6a74112bb2.png?resizew=190)
(1)平面
与平面
是否相互垂直?如果垂直,请证明;如果不垂直,请说明理由;
(2)若
为
的中点,求二面角
的余弦值.
![](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/f6c8ee18facd20036dc1264de8e7c0c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/8/d1722480-b69d-4b20-93a4-be6a74112bb2.png?resizew=190)
(1)平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b03428a8f91a5674cb8f54766c165f7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
(2)若
![](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/5617a404c5a3356753136e5a6b6d51e5.png)
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2023-07-06更新
|
321次组卷
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2卷引用:湖南省株洲市2022-2023学年高一下学期期末数学试题
名校
5 . 如图,在四棱锥
中,底面ABCD是正方形,且
,
,
,
.
(1)设平面
平面
,证明:
.
(2)E是线段PA上的点,且
,二面角
的正切值为
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d27bd71d79cb19eb554175e4ef0867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b80ee363635d73f601654339028daec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed6281306726065e7075c579b9b66537.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42e12bfde565540f059dd27ea47dfaa7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/9/8199ae84-5e62-4a81-9ac0-11e599c8e184.png?resizew=172)
(1)设平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1084a42a7b7600ac9651a023de6d3401.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebae74545340ce6971f437d129e9c659.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c8ded7e84e5d68905bc8cf249fbfbe2.png)
(2)E是线段PA上的点,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c557c195404019d734f85bc7c3a2ae10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e4be6ee295b46490a1eed671b6975a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1174142f3bba761585b6bc2653009b36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
您最近一年使用:0次
2023-07-06更新
|
590次组卷
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3卷引用:湖南省衡阳市第一中学2022-2023学年高一下学期期末数学试题
6 . 已知正四面体
,下说法中正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
A.![]() ![]() |
B.直线![]() ![]() ![]() |
C.平面![]() ![]() ![]() |
D.若![]() ![]() ![]() ![]() |
您最近一年使用:0次
7 . 在古代数学中,把正四棱台叫做方亭,数学家刘徽用切割的方法巧妙地推导出了方亭的体积公式
,a为方亭的下底面边长,b为上底面边长,h为高.某地计划在一片平原地带挖一条笔直的沟渠,渠的横截面为等腰梯形,上底为10米,下底为6米,深2米;渠长为784.5米,并把挖出的土堆成一个方亭,设计方亭的下底面边长为70米,高为6米,则其侧面与下底面所成的二面角的正切值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b4b304aff9c6b28341128d5d0bb8714.png)
您最近一年使用:0次
8 . 如图,三棱锥
中,
,
.
(1)求证:
;
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6a94d59dee2d5a8f0425b64b2083825.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de13256f52663ee5809a964eb28725bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1385c59d0fe2bc62fed70a2d13a5e956.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/6/f322246c-e0e0-48b4-aef3-4736c5de432f.png?resizew=163)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99116c812715c5e15ee73d088da4c253.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef5768a8d6630375daf58e971fa200c5.png)
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2023-07-05更新
|
341次组卷
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2卷引用:湖南省邵阳市2022-2023学年高一下学期期末数学试题
名校
9 . 如图,在三棱锥
中,平面
平面
,
,
为
的中点.
(1)证明:
;
(2)若
是边长为
的等边三角形,点
在棱
上,
,且三棱锥
的体积为
,求二面角
的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcf6dc837ae85207789b94d109c5c2eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e735a28578ba191da6d4f3b0f8e8729.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/8/c70127f2-723a-4858-bed7-0e1083bd0155.png?resizew=188)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21be01a95cdd3149512bf95d6084fdd6.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4807ca16360c0cca436e59d4be98f626.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46d76c5ac5c9f0a2ec064487c02c476e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69a8b76e36783a69d14ec54af82c7df0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/324d453870b345da0c41977290192f94.png)
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2023-07-05更新
|
363次组卷
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3卷引用:湖南省怀化市2022-2023学年高一下学期期末数学试题
名校
10 . 如图1,平面四边形
中,
,
,
,E为
的中点,将
沿对角线
折起,使
,连接
,得到如图2所示的三棱锥
.
(1)证明:平面
平面
;
(2)已知直线
与平面
所成的角为
,求平面
与平面
夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98e486a1aad96167ff62f6fb5136e0bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36c4559d27e3905980d1a4f1856f07de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bf10d92f20501e19d25f6f4159aab89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7aa1162d5481e2441fe5bc0d49a576b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4357d5744046d4d44abb09e1ee35fcb.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/26/8d6286fc-3716-438a-b431-6dfbbd9d7045.png?resizew=373)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d28c625d7ac6878957facc8274d459c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
(2)已知直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15615de1a6df206dbd081251f676578e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7abd284f76d9f5769bc189508ce2572b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9dfaad4c4467e27421876d8f2a4371d2.png)
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