1 . 如图,在四棱锥
中,四边形
是菱形,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/3/f3a6b22b-d1a0-40f1-9c9c-6ffb655cd8cd.png?resizew=170)
(1)证明:平面
平面
.
(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/917059c4d68de6935b5b010edd3b2efb.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/3/f3a6b22b-d1a0-40f1-9c9c-6ffb655cd8cd.png?resizew=170)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d077f6da8b2c00b152d4679aa2ed7f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9b31c44f920e6e09b02f03ec82ef843.png)
您最近一年使用:0次
2024-03-03更新
|
454次组卷
|
2卷引用:贵州省黔东南苗族侗族自治州2023-2024学年高三上学期九校联考(开学考)数学试题
名校
解题方法
2 . 如图1,在边长为4的正方形
中,
是
的中点,N是
的中点,将
,
分别沿
,
折叠,使B,D点重合于点P,如图2所示.
(1)证明:平面
平面
;
(2)在四棱锥
中,
,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/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a5e0a51c9e14fb246b0ba0b231c1e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9eda61683bb1d4d62441f0625097b477.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f50b3ae183997b707d16eb4e7f6712fa.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/19/3962a3ff-c2d7-46c9-8624-2c81deb82ef5.png?resizew=322)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e462c38951671d0dbbea78246da9f580.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7476d9918d30619e35cedf37fb6c5842.png)
(2)在四棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac3f04eca7b99e5a916a2ca60a1be139.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67bdcce6bb11dbc95121c3a890349e90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82cb18c10820d927ecd53326f58aaf8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/034607aebe259aa219fd10da60b0cb1f.png)
您最近一年使用:0次
2024-02-06更新
|
259次组卷
|
3卷引用:重庆市第八中学校2023-2024学年高二下学期入学适应性训练数学试题
重庆市第八中学校2023-2024学年高二下学期入学适应性训练数学试题福建省福州市福清市高中联合体2023-2024学年高二上学期期末联考数学试题(已下线)第3章 空间向量及其应用(知识归纳+题型突破)-2023-2024学年高二数学单元速记·巧练(沪教版2020选择性必修第一册)
3 . 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
|
466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】广东省广州市三中2023-2024学年高二下学期期中数学试题
名校
解题方法
4 . 如图所示,用平面
表示圆柱的轴截面,
是圆柱底面的直径,
为底面圆心,
为母线
的中点,已知
为一条母线,且
.
(1)求证:平面
平面
;
(2)求平面
与平面
夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e07956720a50ff238c0766a5d58d00e2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/19/6ae32c15-3cd0-4881-a763-c67b4b986afe.png?resizew=180)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d66cdf7f987bb08a83b732a071ac2ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcc28d80236679dacffd255cf64f1384.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b43cbc92b5f5c26c7f70b52b27616a81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9cd1ad6b8eac07253212dc6ec1168b96.png)
您最近一年使用:0次
2024-02-04更新
|
350次组卷
|
4卷引用:河南省南阳市卧龙区博雅学校2023-2024学年高二下学期开学考试数学试题
河南省南阳市卧龙区博雅学校2023-2024学年高二下学期开学考试数学试题安徽省合肥市第八中学2023-2024学年高二上学期期末考试数学试题2024届高三新改革适应性模拟测试数学试卷五(九省联考题型)(已下线)微考点5-2 新高考新试卷结构立体几何解答题中与旋转体有关的问题
名校
解题方法
5 . 如图,在三棱柱
中,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/17/8aba6356-3813-450b-962a-b303a1286d21.png?resizew=163)
(1)证明:平面
平面
;
(2)若
,求二面角
的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7ad3a578f403b9e6b97fa2dc955fc11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a1be17e0a3e51cde1f50f384198e71e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f06c1cedcc4406a91783f9d37cab421e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7e3c9e7c05de9838c0c5d762720d3ef.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/17/8aba6356-3813-450b-962a-b303a1286d21.png?resizew=163)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3d7090639341730951c1bc3c9b6164e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e53b212640dadf751ef7f65a78a209.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d3a9f832c20d05940e7072552aaede3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/130e68a02a2aa5b667c46401732d6284.png)
您最近一年使用:0次
2024-01-31更新
|
252次组卷
|
2卷引用:四川省绵阳市南山中学2024届高三下学期入学考试数学(理)试题
解题方法
6 . 如图,三棱锥
中,
,
为等边三角形,
为
上的一个动点.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/15/f1a7675a-51e2-410c-b08d-2cd007ce11df.png?resizew=145)
(1)证明:平面
平面
;
(2)当
时,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98d1dcf629b8e79431420348ab9af345.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fbfcae2cecc98e2d6c16dde6d3ec1c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/15/f1a7675a-51e2-410c-b08d-2cd007ce11df.png?resizew=145)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4aa9084b8fe0fe05c4388d1f835587b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c793e088af57bb0ff89012f940f2a29f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f96627abd793ca157d4dd1587f584d.png)
您最近一年使用:0次
2024-01-26更新
|
221次组卷
|
3卷引用:江苏省徐州市沛县第二中学2024届高三下学期期初测试数学试题
解题方法
7 . 在某次数学探究活动中,小明先将一副三角板按照图1的方式进行拼接,然后他又将三角板
折起,使得二面角
为直二面角,得图2所示四面体
.小明对四面体
中的直线、平面的位置关系作出了如下的判断:①
平面
;②
平面
;③平面
平面
;④平面
平面
.其中判断正确的个数是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ec2524be492bca0d1566bf848066f10.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/97f30533da2e1d2a958dc906c37eba9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21f9157fce2a8339d281178c7c0bccbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4eb7e9ad5486cf1c5e506b20c5469e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcf6dc837ae85207789b94d109c5c2eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4eb7e9ad5486cf1c5e506b20c5469e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcf6dc837ae85207789b94d109c5c2eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
A.1 | B.2 |
C.3 | D.4 |
您最近一年使用:0次
2024-01-22更新
|
1335次组卷
|
7卷引用:高三数学开学摸底考 (北京专用)
(已下线)高三数学开学摸底考 (北京专用)北京市丰台区2023-2024学年高三上学期期末练习数学试卷2024年全国普通高中九省联考仿真模拟数学试题(二)(已下线)第14讲 8.6.3平面与平面垂直(第1课时 )-【帮课堂】(人教A版2019必修第二册)(已下线)13.2.4 平面与平面的位置关系(2)-【帮课堂】(苏教版2019必修第二册)(已下线)第四章 立体几何解题通法 专题五 平移变换法 微点3 平移变换法综合训练【培优版】(已下线)专题05 立体几何初步(2)-期末考点大串讲(苏教版(2019))
名校
8 . 如图,在四棱锥
中,底面ABCD为梯形,
,
.
(1)求点
到平面ABCD的距离;
(2)在棱
上是否存在点
,使得平面DBF与平面PBC夹角的余弦值为
?若存在,求出点
的位置;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ffc1e754954a86924402a0bc14d34d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76d8720b7fc8488adfa47321caff2566.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/8/02942b9f-e566-4908-860b-341c1cbe05c2.png?resizew=167)
(1)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
(2)在棱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3ffd5c35bba71ea54c28622b6cf505d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
您最近一年使用:0次
2024-01-06更新
|
648次组卷
|
6卷引用:河南省信阳市信阳高级中学2023-2024学年高二下学期易错题回顾测试(开学)数学试题
河南省信阳市信阳高级中学2023-2024学年高二下学期易错题回顾测试(开学)数学试题湘豫名校联考2023-2024学年高二上学期1月阶段性考试数学试题河南省商丘市第一高级中学2023-2024学年高二上学期1月份半月考数学试卷(已下线)专题13 空间向量的应用10种常见考法归类(3)(已下线)第6章 空间向量与立体几何 章末题型归纳总结-【帮课堂】2023-2024学年高二数学同步学与练(苏教版2019选择性必修第二册)山东省菏泽市定陶区第一中学2023-2024学年高二上学期期末模拟数学试题
名校
解题方法
9 . 如图所示,在几何体
中,
平面
,点
在平面
的投影在线段
上
,
,
,
,
平面
.
平面
.
(2)若平面
与平面
的夹角的余弦值为
,求线段
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea1e3a43d0fa18f6c0888ba804d5b329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca5dd496ee0c1170ef6dcc48266ee444.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bbc137cb348cbb7a70274cdd4f4ca8d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e2b5060e1311f27bcbde24dac84db8b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5c964573daaf5f1dcf8319030f90465.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16ed75e65e7374c38ffb1f75259a8beb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6785c7c85a503531649f9c9b4cbfcf04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/342d452a7b850cd3a15b23619ad39bd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
(2)若平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/190a6fdd4bb8d1b3bb239f188deb9d9b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
您最近一年使用:0次
2024-02-27更新
|
231次组卷
|
2卷引用:吉林省通化市梅河口市第五中学2023-2024学年高二下学期开学考试数学试题
解题方法
10 . 如图,三棱柱
中,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d26d8a9d64ad3c8cba28840b41ed7837.png)
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d26d8a9d64ad3c8cba28840b41ed7837.png)
,
,
,
.
(1)求证:平面![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9afac7c616bbb14e1ed428a3c507c7dc.png)
平面
;
(2)若锐二面角
的余弦值为
,求三棱柱
的体积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d26d8a9d64ad3c8cba28840b41ed7837.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d26d8a9d64ad3c8cba28840b41ed7837.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53519e49db68cfd707c040131e1a8d92.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca036d049f5205cf04cb1b9c5cd03f97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92535536bd3c2761724fd058427f95a8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/21/134b65be-a7b7-4843-8ee1-430b75d36205.png?resizew=156)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9afac7c616bbb14e1ed428a3c507c7dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1633988fd62a652de726ee92a917b52d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d9a8181f7a7fe7f3fac872ce9534f15.png)
(2)若锐二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45cbb74984939d59964559c3560ef7ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1174142f3bba761585b6bc2653009b36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
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