名校
1 . 在四棱锥
中,
,
,
平面ABCD,E为PD的中点,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/30/e19e64be-3887-4e6c-b034-c49ddfdb43c2.png?resizew=171)
(1)求四棱锥
的体积V;
(2)若F为PC的中点,求证:平面
平面AEF;
(3)求二面角
的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37444a4da006d26dd252bee7c6cecf01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6853d227df9b14f4cbd5560f913e54a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f5019d74a9497f861a0f755ea31d010.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/30/e19e64be-3887-4e6c-b034-c49ddfdb43c2.png?resizew=171)
(1)求四棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
(2)若F为PC的中点,求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d077f6da8b2c00b152d4679aa2ed7f7.png)
(3)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42f4096ff62b4f29932cd8c6eef661a3.png)
您最近一年使用:0次
2020-06-09更新
|
587次组卷
|
3卷引用:2020届广东省深圳市福田中学高三质量监测数学(理)试题
名校
2 . 如图1,平面四边形
中,
,
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4357d5744046d4d44abb09e1ee35fcb.png)
![](https://img.xkw.com/dksih/QBM/2020/4/18/2444257095041024/2444380746678272/STEM/943f0bd2d8234359b05fe37cd44b33c5.png?resizew=450)
(1)证明:平面
平面
;
(2)已知直线
与平面
所成的角为
,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99b6e1f4d5902578d398f2fd3cee72f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9f8f01137e92c0f2e63467036ae9cce.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/2020/4/18/2444257095041024/2444380746678272/STEM/943f0bd2d8234359b05fe37cd44b33c5.png?resizew=450)
(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/af9955b5aebb73cd84447e8541f901ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f1854ba6cc92481d7a616bd2788a47e.png)
您最近一年使用:0次
2020-04-18更新
|
1016次组卷
|
8卷引用:山东省日照市第一中学2020届高三下学期模拟考试数学试题
名校
解题方法
3 . 如图,矩形
所在的平面与正三角形
所在的平面互相垂直,
为
的中点,连接
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/5/643197eb-9fd4-47b8-b17a-34c5d0941633.png?resizew=174)
(1)证明:平面
平面
;
(2)若直线
与平面
所成的角为
,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10fc7991ea17d54ff5f4445ac5699463.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c8ba4da3a6b049f010c91ccb4f328ee.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/5/643197eb-9fd4-47b8-b17a-34c5d0941633.png?resizew=174)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1af463c1192cc6472c70ca84d9bdeb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13b2ef1b525d302da087241e37387fa6.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10fc7991ea17d54ff5f4445ac5699463.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ccfd81d120348601cd611241d1a5dc4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42f4096ff62b4f29932cd8c6eef661a3.png)
您最近一年使用:0次
名校
4 . 如图,四棱锥
的底面为直角梯形,
,
,
,
,平面
平面
,二面角
的大小为
,
,
为线段
的中点,
为线段
上的动点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/27/37181330-3379-4783-880a-2d639a003ae1.png?resizew=204)
(1)求证:平面
平面
;
(2)是否存在点
,使二面角
的大小为
,若存在,求
的值,不存在说出理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/faeb97acf19bd3b2c6c77c2814df4d2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f79863ffcfa63117ca6741b20a48e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8af620f6d204d310d8e3f267fdd6c3f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6aa8317efcb33660a196ec3538ca66c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/235d1553f6806c1eee3b17b94d23f0f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4155f313a2a5b634f83de8a6b1f1596d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f8427b837e40706c5e436accbd90b87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c2bc5e50b8dfa02601c70822252854a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/27/37181330-3379-4783-880a-2d639a003ae1.png?resizew=204)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b6e6192cf24ada791c26c2d6d434069.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ef796b46e68fe77b117ff0483d2370c.png)
(2)是否存在点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/496eefb185e0ed09af5655772958ae9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b89fa29225a47f983fcfdafc6c44ef7e.png)
您最近一年使用:0次
2020-03-25更新
|
1019次组卷
|
3卷引用:广东省佛山市第一中学2020-2021学年高二上学期第一次段考数学试题
5 . 如图1,在边长为
的正方形中
,
、
分别为
、
的中点,沿
将矩形
折起使得
,如图2所示,点
在
上,
,
、
分别为
、
中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/29/b79bce78-46be-40c3-81d1-1ba9b53abf23.png?resizew=291)
(1)求证:
平面
;
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38387ba1cadfd3dfc4dea4ca9f613cea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f90c780dac29ff8b7df5881d3b33abab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/044054dd6ff9f7042a88678e47599c0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c87eb3ed1ee03bb5426d1a1ff1cde70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa0d8cc5869cc7e551dd4e204c58ec68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31e55e398e8520d8a36fb5a625a085b8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/29/b79bce78-46be-40c3-81d1-1ba9b53abf23.png?resizew=291)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7592c4f01c8e06c7ee90df5b9413a9f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb802b0cd77d772dceff0d9ff6c879ac.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a87d60bda1854b24ab299b5b11eaf1b.png)
您最近一年使用:0次
名校
解题方法
6 . 在长方体
中,
,
,则平面
与平面
所成的二面角的正弦值是_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92535536bd3c2761724fd058427f95a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f4aca5534bce25acaeb7379deed8f8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80a5bc11a77c2d0c4631b8dae59d451c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f3006b76051e90cd338463c3bca6fb4.png)
您最近一年使用:0次
名校
7 . 在正方体
中,
,
分别是
,
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/15/34776a3c-9b1b-4ccf-a2ae-ca1d87da9919.png?resizew=169)
(1)求证:
平面
;
(2)作出二面角
的平面角,并求出它的余弦值.
![](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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f66fb71b75b63594ebeeeebd1963eed5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e26d9636ad77369535852c6e4493446a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/15/34776a3c-9b1b-4ccf-a2ae-ca1d87da9919.png?resizew=169)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06222ee533c2484ab25321a6abbf98cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc6184b191e6da43911e701121517e.png)
(2)作出二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfa4c2dcb9bb6b53f37e7241186a189b.png)
您最近一年使用:0次
8 . 已知
是圆锥的顶点,
是圆锥底面的直径,
是底面圆周上一点,
,
,平面
和平面
将圆锥截去部分后的几何体如图所示.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/4/c6cbe453-26e3-4511-9c8d-52f5bf29960d.png?resizew=156)
(1)求
与底面所成的角;
(2)求该几何体的体积;
(3)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c092ad8e71db52e8966993beebb50ee3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa7aeb2a8d1437eeb4482c3b6ad9f315.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4eb7e9ad5486cf1c5e506b20c5469e8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/4/c6cbe453-26e3-4511-9c8d-52f5bf29960d.png?resizew=156)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
(2)求该几何体的体积;
(3)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca6d1c5eace748465b2dad5065f5111c.png)
您最近一年使用:0次
解题方法
9 . 已知如图:四边形
是矩形,
平面
,且
,
,点
为
上一点,且
平面
.
(1)求三棱锥
的体积;
(2)求二面角
的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2ffc6952e988d04f22f0fb2f7f0ab7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c09afc70f448545336304333d5b5658b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/941eba4dbc1094107e1eeb02c8d8cd56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a9286db92f635afd4fcea5aa3f73436.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fa3c61d6c19e187b4b824b6f5610cdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c66d99a6a8415ddad22bbed33b64cfb.png)
(1)求三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bb2bc62460d10fc1962c69d456eb740.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a879800a059ce741a99bb2c171f32afe.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/2/fe2f3555-51c3-415e-baa6-8780863a7a0e.png?resizew=161)
您最近一年使用:0次
解题方法
10 . 如图,在正四棱柱
中底面是正方形的直棱柱,侧棱
,
,则二面角
的大小为( )
![](https://img.xkw.com/dksih/QBM/2020/3/1/2410340848279552/2410875148386304/STEM/0e69bf06-a39e-4241-a023-14e66b697188.png?resizew=195)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3da8c338342e38c9aa3f274c053fd5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1b90bf8b51db7a4ff6e0678bd3d1ea0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21ea52361458ce2e49ed0fe99d8e6c02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5adc30ce0445824ea5c0e6660cc5660e.png)
![](https://img.xkw.com/dksih/QBM/2020/3/1/2410340848279552/2410875148386304/STEM/0e69bf06-a39e-4241-a023-14e66b697188.png?resizew=195)
A.30° | B.45° | C.60° | D.90° |
您最近一年使用:0次