1 . 如图,两个共底面的正四棱锥组成一个八面体
,且该八面体的各棱长均相等,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a325f7220b9d63033befaa589646e802.png)
A.平面![]() ![]() |
B.平面![]() ![]() |
C.直线![]() ![]() ![]() |
D.平面![]() ![]() ![]() |
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2 . 在四棱锥
中,底面
是边长为
的正方形,顶点
在底面内的射影
在正方形
的内部(不在边上),且
,
为常数,设侧面
与底面
所成的二面角依次为
,则下列各式为常数的是( )
①
②
③
④![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b8ce39f25b73f8b2e33e5977881f4b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faeb97acf19bd3b2c6c77c2814df4d2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40c108b335ca10bd2a6fd7d90e7287f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2338b97ef987779263cba61ceb790082.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68bdeb716a658088cb15f94d07d73409.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fbeee7959e179725a9b251bb269da6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4886dc9ec29d6e974cbbb56689eef40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a702c8b3689f20c9d43641afdf0e4b0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b8ce39f25b73f8b2e33e5977881f4b4.png)
A.①② | B.②④ | C.②③ | D.③④ |
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3 . 如图,在三棱柱
中,平面
平面
,
边长为4的正方形,
,
.
平面
;
(2)求二面角
的余弦值;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3d7090639341730951c1bc3c9b6164e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ac61c24f99a4e466f1e2ea011893866.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ac61c24f99a4e466f1e2ea011893866.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efc6e4b936d7a800e839a30c3839574d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7788830ed1cb3b9c5988f70f43595f2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5845ccc0d735dc14c92a8926d9b1def6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95183b555d54b3a09ac20e9dcacb02ec.png)
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4 . 如图,在棱长为2的正方体
中,点
是棱
上的动点.
;
(2)若点
是棱
的中点,求二面角
的大小.
![](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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31b30478b45ea023eb5d23805aadf709.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dee31a4af85968dc63bd86a779a77d34.png)
您最近一年使用:0次
2024-02-12更新
|
191次组卷
|
2卷引用:上海市新川中学2023-2024学年高二上学期期末数学试题
5 . 如图,在四棱锥
中,底面
是矩形,
是
的中点,
平面
,且
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/12/ee2b26db-04bb-4488-bf81-f8e26d6b8d2a.png?resizew=138)
(1)求证:
;
(2)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/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1b49f64e0065edad868b25e9fcada3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e4720bd0e6a1d47a84e19b60d4ea36c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d27bd71d79cb19eb554175e4ef0867.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/12/ee2b26db-04bb-4488-bf81-f8e26d6b8d2a.png?resizew=138)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b44f4120c94cb7176dc31fcac387b32e.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9e81c256be76e1d0a71a09a75fe91d8.png)
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6 . 如图,在直三棱柱
中,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/8/77ad79b6-0906-4c6a-a511-0af51f8c90bc.png?resizew=142)
(1)证明:直线
平面
;
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ae1b5a1a3f5cb44a771944e1534563b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/8/77ad79b6-0906-4c6a-a511-0af51f8c90bc.png?resizew=142)
(1)证明:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4560fa4ad459b58b723c74bd24e51ebf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9afac7c616bbb14e1ed428a3c507c7dc.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7994f25559402687fa7f7d8a3966928.png)
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7 . 如图,在四棱锥
中,底面ABCD为正方形,平面
平面ABCD,点M为线段PB中点,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/6/1d39dabf-a6ff-4351-8e9a-29f2a8585b48.png?resizew=215)
(1)证明:
平面MAC;
(2)求二面角
的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93edc7bb513f40a89173121c8570cd65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1328e05d150f86dbe18656662eaa8f6b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c5ace226a547e68702df548b08cb5a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/6/1d39dabf-a6ff-4351-8e9a-29f2a8585b48.png?resizew=215)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/826bf6fa3706921b77ad0eb4fcc206bd.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daffe333e60992bb4590370b79b806d5.png)
您最近一年使用:0次
名校
解题方法
8 . 已知圆锥的顶点为
,底面圆心为
,
为底面直径,
,
,点
在底面圆周上,且点
到平面
的距离为
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8b3bfde4b7cbca10de7d63bb7b2cfd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b80ee363635d73f601654339028daec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d5989c84e320b504511f23eeb6e7357.png)
A.该圆锥的体积为![]() | B.直线![]() ![]() ![]() |
C.二面角![]() ![]() | D.直线![]() ![]() ![]() |
您最近一年使用:0次
2024-02-05更新
|
212次组卷
|
4卷引用:山东省威海市2023-2024学年高二上学期期末考试数学试题
山东省威海市2023-2024学年高二上学期期末考试数学试题河南省郑州市宇华实验学校2023-2024学年高二下学期开学摸底考试数学试题(已下线)专题08 立体几何异面直线所成角、线面角、面面角及平行和垂直的证明 -《期末真题分类汇编》(北师大版(2019))(已下线)高一数学期末模拟试卷02-《期末真题分类汇编》(北师大版(2019))
9 . 如图,在三棱柱
中,D为
的中点,
,平面
平面
.
平面
;
(2)设
,四棱锥
的体积为
,求平面
与平面ABC所成角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ac96a75b3a3a7b0a36bb1f0d04563e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ba609142a263c93c2b81fafc6d2034.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e53b212640dadf751ef7f65a78a209.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3d7090639341730951c1bc3c9b6164e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e53b212640dadf751ef7f65a78a209.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a721c8a8da776f6dbe349e3f98e7a878.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b0b89497679f4adce65b610e49d6159.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16ca6a9d7a5eaa4e5d39aa1544f95342.png)
您最近一年使用:0次
2024-02-04更新
|
468次组卷
|
5卷引用:江西省宜春市丰城市第九中学2023-2024学年高二下学期开学考试数学试题
江西省宜春市丰城市第九中学2023-2024学年高二下学期开学考试数学试题广东省广州市三中2023-2024学年高二下学期期中数学试题江西省赣州市2024届高三上学期期末数学试题湖南省株洲市第一中学2022届高三上学期期中数学试题(已下线)第七章 应用空间向量解立体几何问题拓展 专题一 立体几何非常规建系问题 微点1 立体几何非常规建系问题(一)【培优版】
名校
解题方法
10 . 在
中,
,将
沿
翻折,使
,则平面
与平面
夹角的余弦值是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/15/3545edd1-d50b-4ff7-86ce-76b4b0ad7f9d.png?resizew=176)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5dae7ef987d936f54c5396b5c5a05a0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af633abfe3cb03f1836db6c570a5bcc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efb49d869110f27140f5c1934143db2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8010e1a73f05117a278860c1c0c7f147.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/15/3545edd1-d50b-4ff7-86ce-76b4b0ad7f9d.png?resizew=176)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次