名校
1 . 在多面体
中,
,
,
平面
,
,
为
的中点.
(1)求证:
平面
;
(2)若
,求二面角
的平面角正弦值的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9142a8490de14a87eda628ffa7e28982.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb5a4bf8028cee9396367b68ea8e6f80.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e210c9698063925ad2df6b6c1749571.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f4c3f9dd5d0343597a7f58a1989b537.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fa7bbd7831e9ff4f8cffc8889d34f05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/936c74c9a7edc81c037f4ea795d130bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/26/3db8ca47-7075-4025-a065-4e973e951940.png?resizew=134)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57f9d682e5d3cc8573574d8d11636758.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4eb7e9ad5486cf1c5e506b20c5469e8.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/474b9ae5b7ff355c6b74332d68eeb8e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8aad963ee7cdc7ff35a8dd23685589d1.png)
您最近一年使用:0次
名校
2 . 在长方体
中,
,
是
的中点.
(1)求
到面
的距离;
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbff493a22d755c6b473513e2e39ecc2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/26/7c62f25b-a339-4013-8d4d-3a7f6e8fb93d.png?resizew=216)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/657dffbd3623b705f871878fbd9df57e.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/955f3769e96cda449caafc716ea4d5be.png)
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3 . 如图,在四棱锥P-ABCD中,底面ABCD是菱形,AB=2,
,△PAB是正三角形,平面PAB⊥平面ABCD,点Q是线段PC的中点.
(2)求平面PBC与平面BCD夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5426eb71ac190dc6d329e9630c87c83.png)
(2)求平面PBC与平面BCD夹角的余弦值.
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2023-07-09更新
|
394次组卷
|
3卷引用:安徽省安庆、池州、铜陵三市2022-2023学年高一下学期联合期末检测数学试题
安徽省安庆、池州、铜陵三市2022-2023学年高一下学期联合期末检测数学试题(已下线)云南省昆明市五华区2023-2024学年高一下学期6月质量检测卷数学试题云南省昆明市五华区2023-2024学年高一下学期6月质量检测卷数学试题
4 . 如图1,将正方体沿交于同一顶点的三条棱的中点截去一个三棱锥,如此共可截去八个三棱锥,截取后的剩余部分称为“阿基米德多面体”.阿基米德多面体是一个有十四个面的半正多面体,其中八个面为正三角形,六个面为正方形、它们的边长都相等,又称这样的半正多面体为二十四等边体.如图2,现有一个边长为2的二十四等边体、则关于该二十四等边体说法正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/12/a4c43358-1fbb-40b2-947c-352dff6dca84.png?resizew=370)
A.该二十四等边体的表面积为![]() |
B.共有8条棱所在直线与直线AB异面,且所成角为![]() |
C.任意两个有公共顶点的三角形所在平面的夹角余弦值均为![]() |
D.该二十四等边题的外接球的体积为![]() |
您最近一年使用:0次
名校
5 . 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)
您最近一年使用:0次
2023-07-05更新
|
367次组卷
|
3卷引用:安徽师范大学附属中学2023-2024学年高二上学期开学考试数学试题
6 . 如图,在四面体P-ABC中,△ABC是等腰三角形AB⊥BC,
.
(1)证明:PB⊥AC;
(2)若AB=2,
,PA⊥AB.
(ⅰ)求点A到平面PBC的距离;
(ⅱ)求二面角
的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/328b3eb865249e3f6cd99070624adf50.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/5/50d16217-4bf1-4a1b-b093-f35439a4f950.png?resizew=110)
(1)证明:PB⊥AC;
(2)若AB=2,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0df49b91d399a0b28d5ad86b84b1f42d.png)
(ⅰ)求点A到平面PBC的距离;
(ⅱ)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a438393ddfc7da1804baf4932442bb35.png)
您最近一年使用:0次
解题方法
7 . 如图所示,在四棱锥
中,底面
是边长2的正方形,侧面
为等腰三角形,
,侧面
底面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/3/47e47963-7169-45e7-a100-558c0e04bb19.png?resizew=148)
(1)在线段
上是否存在一点
,使得
,若存在,请求出
的值,若不存在,请说明理由;
(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/852aabd89edffc1b94344ff3f1f31ccd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98239be016121504e11c8cae78c87e8e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93edc7bb513f40a89173121c8570cd65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/3/47e47963-7169-45e7-a100-558c0e04bb19.png?resizew=148)
(1)在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4486d52b6e410fd7b60428121d96cef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6913c327ccb0c3133eb9fa51a67ccb93.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b796bbaeb8450404c2d146283562006e.png)
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8 . 如图,在四棱锥
中,
平面
,底面
为矩形,且
,则( )
![](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/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a2448fb5e984ba8633cb8a85c470a0c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/25/52a14e55-0217-4e5c-8d92-1623744158eb.png?resizew=196)
A.平面![]() ![]() | B.点![]() ![]() ![]() |
C.二面角![]() ![]() | D.若平面![]() ![]() ![]() ![]() |
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9 . 如图,
为正方体,下面结论中正确的是______ .(把你认为正确的结论都填上)
①
平面
;
②
平面
;
③
与底面
所成角的正切值是
;
④二面角
的正切值是
;
⑤过点
与异面直线
与
成
角的直线有2条.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/27/a5659a3f-deea-436f-a55e-d874341714c1.png?resizew=172)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e3c0430146b7b8d40ebb721a4d0de19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e86eec8526479272d15bb3b171a46de0.png)
②
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d1d2e0f281222a5f289ea4008370aed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e86eec8526479272d15bb3b171a46de0.png)
③
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24bb49fdc6b6bbb2449fdf8a0de769d3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
④二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52bd8b014ebd8b1cc34b66912b0b9ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
⑤过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fd4c85bb98a2a0afddd7ed92578ad2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16aa0b9869db50a9ab48cc32925d8e96.png)
您最近一年使用:0次
名校
解题方法
10 . 已知正四面体ABCD,设异面直线AB与CD所成的角为
,侧棱AB与底面BCD所成的角为
,侧面ABC与底面BCD所成的锐二面角为
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f435efcc7869eec21bdba1ed81dc3f5.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2023-06-05更新
|
453次组卷
|
5卷引用:安徽省亳州市第一中学2021-2022学年高二上学期9月教学检测数学试题
安徽省亳州市第一中学2021-2022学年高二上学期9月教学检测数学试题人教B版(2019) 选修第一册 北京名校同步练习册 第一章 空间向量与立体几何 1.2空间向量在立体几何中的应用 1.2.4二面角(二)(已下线)第五篇 向量与几何 专题17 三正弦定理、三余弦定理 微点2 三正弦定理、三余弦定理综合训练(已下线)第二章 立体几何中的计算 专题一 空间角 微点13 三正弦定理与三余弦定理综合训练【培优版】(已下线)第四章 立体几何解题通法 专题四 投影变换法 微点2 投影变换法(二)【培优版】