解题方法
1 . 如图,在直四棱柱
中,底面为矩形,
,高为
,O,E分别为底面的中心和
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/8/35f60545-0d4e-46a4-8bb2-31d451d9b8ff.png?resizew=173)
(1)求证:平面
平面
;
(2)若平面
与平面
的夹角的余弦值为
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8898f497092730555dad482a141c3001.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3eabd5f3a86afe49dcd70571e2b96cfd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/8/35f60545-0d4e-46a4-8bb2-31d451d9b8ff.png?resizew=173)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9b508e5a78733e4bb60265b844019c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82b724168afaee2ecddf97257180be18.png)
(2)若平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0b14cf4977ee2dac0bd5b0fca4dadc3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50f59727be34cd56e46ede26aa3c0cf1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24c14ff9b66f21c05e52dc3c8908c2df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4edef1f22e4d30db5fa5d337dc76d581.png)
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2024-03-30更新
|
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2 . 如图,在四棱锥
中,底面
为菱形,
是边长为2的等边三角形,
.
平面
;
(2)若点
为棱
的中点,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/55a675310c8ba418e5a59beb7317e21e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/014482a0eb1051754b34dd440225deed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93edc7bb513f40a89173121c8570cd65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)若点
![](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/bee4a6b8ef3e79b4482388c3391d8b18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1077520a4816bbb5a37fc45359e34c5c.png)
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3卷引用:云南省大理白族自治州民族中学2023-2024学年高三下学期5月月考数学试卷
3 . 如图,平面
平面
,四边形
为矩形,
为正三角形,
,
为
的中点.
平面
;
(2)已知四棱锥
的体积为
,求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cf9a6db3571fa57bfa2d5e4d44c51b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c610eab074474dc50696f6c482f7297.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0923c7ceaa0ca373ee0fd09a96d084ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3eae2409b93de8eebbeee9c01ac7fe30.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/6a8507f2af46db667e7c98ad106c886e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d1660ea13653a5aec705600edf0d56e.png)
(2)已知四棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2542516d7c81bbf8bfb68dcd876f7d9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/839c7616cd0d90265f4b2c9c021254fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4eb0c8edc1765b9386308775bccd268.png)
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8卷引用:云南省大理白族自治州祥云县祥云祥华中学2023-2024学年高一下学期4月二调数学试题
云南省大理白族自治州祥云县祥云祥华中学2023-2024学年高一下学期4月二调数学试题四川省成都市四七九名校2023届高三全真模拟考试(二)文科数学试题(已下线)高三数学开学摸底考02(新考法,新高考七省地区专用)四川省泸州市泸县第五中学2024届高三上学期期末数学(文)试题四川省宜宾市叙州区第二中学校2024届高三上学期期末数学(文)试题(已下线)第二章 立体几何中的计算 专题二 空间距离 微点3 点到平面的距离(二)【培优版】(已下线)第八章 立体几何初步(压轴题专练)-单元速记·巧练(人教A版2019必修第二册)(已下线)高一下学期期中复习解答题压轴题十八大题型专练(2)-举一反三系列(人教A版2019必修第二册)
4 . 如图,在菱形ABCD中,
,
,M为BC的中点,将
沿直线AM翻折成
,连接
和
,N为
的中点,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e075468e7fb0bf30229aec01a7205977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a5e0a51c9e14fb246b0ba0b231c1e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84e054544e4ece645f5e06c9d24a8b64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7f6f93171329d508d491143b9d71f7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87cdc08e1c4a04a18d5ecea03393e36d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87cdc08e1c4a04a18d5ecea03393e36d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/2/12ed7ded-1a3a-48c6-9092-f5bf3a592c77.png?resizew=179)
A.平面![]() |
B.线段CN的长为定值 |
C.当三棱锥![]() ![]() ![]() |
D.直线AM和CN所成的角始终为![]() |
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3卷引用:云南省下关第一中学2023-2024学年高二上学期见面考试数学试题
5 . 如图,在四棱锥
中,
底面
,底面
是直角梯形,
,
,
,E是
上的点.
平面
;
(2)若E是
的中点,且二面角
的余弦值为
,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/b5f1897a7e856b42f8cee0f286ad913d.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/1134c8e3440abb6cd385af2c169037fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f79863ffcfa63117ca6741b20a48e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fd3c2e2199cd4565c05b949bc21fc37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/677d1863ff4d8ac1604b18149d4f320f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
(2)若E是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5102c216393e133fa25dba98cd78535.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1174142f3bba761585b6bc2653009b36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca48c18021e7be4bbb3e95576e1c1b5f.png)
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|
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6卷引用:云南省大理白族自治州民族中学2023-2024学年高二下学期见面考试数学试题
6 . 如图,多面体
中,四边形
为矩形,
,
.求证:
(1)平面
平面
;
(2)平面
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9165d9bfbb0f0d19eb482c2a4c1b29b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5519c1efed9b34725446c2ee488ab3c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddbb52f9b226b1db3f6f9f055948bd38.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/29/65d87c88-5db8-46c5-a3c4-bd28fe03c569.png?resizew=248)
(1)平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e83e602c2b4540c6c7454f5f0948544.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a32bd7a1b78b5a0ec562c4025aea8c.png)
(2)平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d28c625d7ac6878957facc8274d459c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32c05247f6998d7a70d31d13be4148c.png)
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7 . 将直角三角形ABC沿斜边上的高AD折成120°的二面角,已知直角边
,
,那么下面说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68b40d0d2f3cdd8981bb792ad87efb42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10c013bbe1fb6e9acf461548b5cf6cd2.png)
A.平面![]() ![]() |
B.四面体![]() ![]() |
C.二面角![]() ![]() |
D.BC与平面ACD所成角的正弦值是![]() |
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8 . 如图,在四棱锥
中,
底面ABCD,
,E为棱PD的中点,F是线段PC上一动点.
平面PAB;
(2)若直线BF与平面ABCD所成角的正弦值为
时,求点C到平面AEF的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6be2b61f4a38e2ee2c1a01e00b3ae6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afb18c7c5391647214d4da31a88202d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12040970d765f83dc194b05fc0a7307d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4787d10940c2bfca1c5aded470034a13.png)
(2)若直线BF与平面ABCD所成角的正弦值为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/137f98c6367086cc159aaa5f2e45ee7d.png)
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|
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5卷引用:云南省下关第一中学2023-2024学年高二下学期5月期中数学试题
名校
解题方法
9 . 如图所示,在三棱锥
中,
平面
,
,过点
分别作
,
,
,
分别为垂足.
平面
;
(2)求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbfbaf73297240eb116f22489519895a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f392902d611863c6908a48e696e7bd8f.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/6d077f6da8b2c00b152d4679aa2ed7f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a4a6a1e70241d600bc6c104313eac61.png)
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名校
解题方法
10 . 如图,棱长为1的正方体
中,
为线段
上的动点,则下列结论正确的是( )
![](https://img.xkw.com/dksih/QBM/2021/12/27/2881400242135040/2881639727726592/STEM/d119aba3-320f-478c-b9e7-8c7b90edc8b6.png?resizew=341)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e26d9636ad77369535852c6e4493446a.png)
![](https://img.xkw.com/dksih/QBM/2021/12/27/2881400242135040/2881639727726592/STEM/d119aba3-320f-478c-b9e7-8c7b90edc8b6.png?resizew=341)
A.![]() ![]() | B.![]() ![]() |
C.![]() | D.点![]() ![]() ![]() ![]() |
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