解题方法
1 . 如图,在四棱锥
中,平面
平面
,底面
为菱形,
,
是
的中点.
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/e4aa9084b8fe0fe05c4388d1f835587b.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/05740f0c6071846227dc0ec177ad15e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afc7eef759df95a3ed7247d1b282f506.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78a3fd5284e160896f07ce367645fd04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e6c2dad46a9052a4185a4f7b4ae8a2e.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc9f783884705e6092fd35fd9222dae1.png)
您最近一年使用:0次
2024-05-16更新
|
1510次组卷
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4卷引用:广东省揭阳市2024届高三下学期二模考试数学试题
名校
2 . 如图,在四棱锥
中,四边形
是正方形,
,M为侧棱PD上的点,
平面
.
.
(2)若
,求二面角
的大小.
(3)在(2)的前提下,在侧棱PC上是否存在一点N,使得
平面
?若存在,求出
的值;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/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/267172a953126e44e36ab085165543ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1b49f64e0065edad868b25e9fcada3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb304d905125170bebfada27e7ed8960.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccbd1316b9d1f0c1e71fd078deec61f6.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32d0710321d97361e5782124bbf7f0c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f2d2fbc26a7be008f550b5828f615fe.png)
(3)在(2)的前提下,在侧棱PC上是否存在一点N,使得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f214481e6b23307a37940f6dd0313d30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb304d905125170bebfada27e7ed8960.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23d7478de8e7971491d38e784529aff5.png)
您最近一年使用:0次
2024-05-08更新
|
1258次组卷
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4卷引用:广东省揭阳市惠来县第一中学2023-2024学年高二下学期6月月考数学试题
名校
3 . 如图,在四棱锥
中,
底面![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aae458866fd9d3bb378be528e18ca2a7.png)
.
平面
;
(2)求平面
与平面
的夹角的余弦值.
![](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/aae458866fd9d3bb378be528e18ca2a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cf22ed68af76c45b0aee1cbcf82f5f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a5928c98b341b16d4b5a5b931d2929d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
您最近一年使用:0次
2024-03-29更新
|
840次组卷
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2卷引用:广东省揭阳市惠来县第一中学2023-2024学年高二下学期3月月考数学试题
名校
解题方法
4 . 如图,在棱长为1的正方体
中,M,N分别是
,
的中点,
为线段
上的动点,则下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f66fb71b75b63594ebeeeebd1963eed5.png)
A.![]() |
B.存在点![]() ![]() |
C.直线![]() ![]() ![]() |
D.过M,N,P三点的平面截正方体所得截面面积的最大值为![]() |
您最近一年使用:0次
2024-03-03更新
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1418次组卷
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4卷引用:广东省揭阳市惠来县第一中学2023-2024学年高二下学期3月月考数学试题
解题方法
5 . 如图,等边三角形
与正方形
所在平面垂直,且
,
,
与
的交点为D,
平面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/25/2a69bbaf-e76a-420a-b9cb-c33eaa8e0304.png?resizew=170)
(1)求线段
的长度;
(2)求平面
与平面
夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e168672b47d7e64dc1b404f8882c7dcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d887690e3ad82fbf00d4ab3474a1df51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fd4c85bb98a2a0afddd7ed92578ad2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8772aa893a9c1d40f714cb25701701.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a5edfe97aeab0cf16b40fa9d2e15f9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8838d111d7dd1b01302ad1e8aedfbd33.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/25/2a69bbaf-e76a-420a-b9cb-c33eaa8e0304.png?resizew=170)
(1)求线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77a7e4a6765ce78b05ee97764771e01f.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c81ee1a0f7aca14244931128720295f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8838d111d7dd1b01302ad1e8aedfbd33.png)
您最近一年使用:0次
2024-02-21更新
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391次组卷
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2卷引用:广东省揭阳市普宁市华美实验学校2023-2024学年高二下学期第一次阶段考试数学试题
解题方法
6 . 如图,在四棱锥
中,底面ABCD为平行四边形,
为等边三角形,
,
,
,点E满足
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/30/79724376-1af7-4662-87f1-a44e656b276a.png?resizew=162)
(1)证明:平面
平面ABCD;
(2)求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fbfcae2cecc98e2d6c16dde6d3ec1c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d58da37b3d1dbd2fee75089d5ba28134.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e075468e7fb0bf30229aec01a7205977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bafa8c14100a4f847b41b9148954116c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f44bec66934dd2d35ffbf7d863892ed.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/30/79724376-1af7-4662-87f1-a44e656b276a.png?resizew=162)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d077f6da8b2c00b152d4679aa2ed7f7.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
您最近一年使用:0次
名校
7 . 如图,在四棱锥
中,底面
是边长为
的正方形,
,
,
.
.
(2)若
,求平面
与平面
夹角的余弦值.
![](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/95bacae35b6e16a0a33c2bdc6bc07df7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32d0710321d97361e5782124bbf7f0c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1720da6d65e7fa854d98322d3864240.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b80ee363635d73f601654339028daec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b07e317ffe7859e81b42ef4970e344a.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e975537dce0d32559baacd6937a6ce3a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ddb7c2ca1b6bee86cb24fed02e40da2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
您最近一年使用:0次
2024-01-13更新
|
390次组卷
|
3卷引用:广东省揭阳华侨高级中学2024届高三下学期第二次阶段(期中)考试数学试题
解题方法
8 . 如图,在几何体
中,△ABC是边长为2的正三角形,D,E分别是
,
的中点,
,
平面ABC,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/7/5eb51012-dd4e-4a0c-aa7c-a1025a264a4c.png?resizew=146)
(1)若
,求证:
平面
;
(2)若平面
与平面ABC夹角的余弦值为
,求直线DE与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5ed434785aeba443e99a7e8238eb16c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24bb49fdc6b6bbb2449fdf8a0de769d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fd4c85bb98a2a0afddd7ed92578ad2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d519fa7713f99e8e4ed2b47e477c6715.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a8bfe2553e852df73185d017c0a62fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/462b1c65b1b233ab98a90c164c0968c7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/7/5eb51012-dd4e-4a0c-aa7c-a1025a264a4c.png?resizew=146)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89eac4972d99833acf112d298c6c508b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97f30533da2e1d2a958dc906c37eba9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07b7903de4be7d5dc1175cfbf6e8da9f.png)
(2)若平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07b7903de4be7d5dc1175cfbf6e8da9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/072c32b9948144d040a9a83f8d11ea8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07b7903de4be7d5dc1175cfbf6e8da9f.png)
您最近一年使用:0次
2023-12-15更新
|
293次组卷
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3卷引用:广东省揭阳市惠来同仁北实高级中学2024届高三上学期期中学业诊断数学试题
名校
9 . 如图,在四棱锥
中,底面
为正方形,
底面
,
,点
为线段
的中点,点
为线段
上的动点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/28/547d5c8b-6f6e-4f71-ae8c-54ecb756edca.png?resizew=164)
(1)求证:平面
平面
.
(2)试确定点
的位置,使平面
与平面
所成的锐二面角为
.
![](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/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/829f9180ddd9aa1a0ee0dc520f4e0b5f.png)
![](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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/28/547d5c8b-6f6e-4f71-ae8c-54ecb756edca.png?resizew=164)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6501f1c913a4ef64957a2f01ab5baa15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
(2)试确定点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b03428a8f91a5674cb8f54766c165f7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ac09dc1ca2cdd7aef28c218763d3e4d.png)
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2023-11-26更新
|
154次组卷
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12卷引用:广东省揭阳市惠来县第一中学2021-2022学年高二下学期第一次段考数学试题
广东省揭阳市惠来县第一中学2021-2022学年高二下学期第一次段考数学试题福建省福州市2019-2020学年高三上学期期末质量检测数学(理)试题2020届湖南省长沙市长望浏宁四县高三下学期4月联考理科数学试题广东省佛山市第一中学2022届高三上学期12月月考数学试题山东省实验中学2021-2022学年高三下学期3月诊断训练数学试题广西桂林、崇左、贺州、河池、来宾市2022届高三联合高考模拟考试数学(理)试题广东省惠州市(惠阳中山中学、龙门中学、惠州仲恺中学)三校2023届高三上学期第一次质量检测数学试题福建省福州华侨中学2023届高三上学期第二次考试数学试题河南省南阳市第二中学校2022-2023学年高二上学期12月月考数学试题湖北省宜昌市部分省级示范高中2023-2024学年高二上学期11月月考数学试卷广东省韶关市广东北江实验学校2023-2024学年高二上学期第二次月考(12月)数学试题(已下线)模块三 专题4 大题分类练(立体几何)拔高能力练
名校
解题方法
10 . 如图,在四棱锥
中,底面
为矩形,
,
,
点
为棱
上的点,且
.
(1)证明:
;
(2)若
,求直线
与平面
所成角的正弦值.
![](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/ddd96553383f5c8997c69e65769fa096.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c327b3e91d8bea53255d9308a952a276.png)
点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4999d4fbcbe15f78c29d518f25d317c2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/18/6f450e12-70bb-4daf-90c1-e0233b56d92c.png?resizew=171)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b8e49d68afab33806a63d25a0861c7c.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/272d049563412419aff832cbf22e4a0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
您最近一年使用:0次
2023-11-17更新
|
825次组卷
|
4卷引用:广东省揭阳市普宁市华美实验学校2023-2024学年高二上学期第二次月考数学试题