1 . 在正方体
中,点E,F满足
,
,且x,y,
.记EF与
所成角为
,
与平面ABCD所成角为
,则( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/24/ad809071-0a0d-48bd-afbd-9a590790bb88.png?resizew=165)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0851e4d9e17780514c42382d51fa0ce0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/111489883a7ab93157a566ab86c89db2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a36be0318740b62e478be084bd837a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/24/ad809071-0a0d-48bd-afbd-9a590790bb88.png?resizew=165)
A.若![]() |
B.若![]() ![]() |
C.![]() ![]() |
D.![]() ![]() ![]() ![]() |
您最近一年使用:0次
2 . 如图所示,已知四棱锥
中,底面
为菱形,
平面
,
分别是
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/7/d4c1886e-6511-40a0-b12a-e32e59cee15b.png?resizew=211)
(1)证明:
平面
;
(2)若
为
上的动点,
与平面
所成最大角的正切值为
,求二面角
的正切值.
![](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/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c2ced225ccd8dd96914424789cd547f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/123dddb998fc1b245f9c4b173f9602cf.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/7/d4c1886e-6511-40a0-b12a-e32e59cee15b.png?resizew=211)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f4c3f9dd5d0343597a7f58a1989b537.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/589786dd7c3a2679c3230b671cd232d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a38a3e226347af68d7b15295342e209.png)
您最近一年使用:0次
2019-06-28更新
|
601次组卷
|
4卷引用:浙江省湖州市菱湖中学2018-2019学年高二上学期期中数学试题
浙江省湖州市菱湖中学2018-2019学年高二上学期期中数学试题浙江省温州市求知中学2018-2019学年高二下学期第二次月考数学试题山西省汾阳市2020-2021学年高二上学期期末数学(理)试题(已下线)黄金卷15-【赢在高考·黄金20卷】备战2021年高考数学(理)全真模拟卷(新课标Ⅲ卷)
解题方法
3 . 在三棱锥
中,
两两垂直且相等,若空间中动一点
满足
,其中
且
.记
与平面
所成的角为
,则
的最大值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41e5db1d2fd912f77923e4c120a7dc19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8759e236bed05ad831f89f66070a477.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3251416a7e1d2c573911a7d34f97801.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f10e91bbc8ab50c0713c78c8d919959.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d17d3ddd3a711acbf463c8fc92620251.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/602d0265aa2b89076b0cff90853f7cfa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de7d5ef3a3d9a03be91135fc426d57cc.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
4 . 长方体
中,
,
,则异面直线
与
所成角的大小是_____ ;
与平面
所成角的大小是_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d262480ffb55b7617f44b63f130c154a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ef8866ccf160ddc441bf69c5d3a3d5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fe734023d4e70010a6b2cc3267cb86e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fe734023d4e70010a6b2cc3267cb86e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ebb05874eb3353d754af24c9974273e.png)
您最近一年使用:0次
2018-02-17更新
|
990次组卷
|
4卷引用:浙江省湖州市菱湖中学2018-2019学年高二上学期期中数学试题
名校
5 . 如图,矩形
中心为
,现将
沿着对角线
翻折成
,记
,二面角
的平面角为
,直线
和
所成角为
,则( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/4/cd5bfb67-b47b-477e-9a8d-b3c4fdc339dd.png?resizew=162)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c68101f8ffeb967bc23490e566636c54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/644f63756fe9251e65cc14e1ce9723d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a313fa9db2c50907e7341b07cdde8021.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2494168ffc550b1417f20e47c13aa81a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/001a1ffb477e4fde288a68618803b0e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f435efcc7869eec21bdba1ed81dc3f5.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/4/cd5bfb67-b47b-477e-9a8d-b3c4fdc339dd.png?resizew=162)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
2019-12-03更新
|
494次组卷
|
3卷引用:浙江省湖州、衢州、丽水三地市2019-2020学年高三上学期期中数学试题
名校
6 . 如图,在四棱锥
中,
平面
,
,
,
,平面
平面
,
是正三角形.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/8/a61eb106-2291-428e-9901-01ad18966288.png?resizew=164)
(1)求证:
平面
;
(2)求二面角
的平面角的正切值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68fdb2b9d6a4a54ed1328c5b3adcf7b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb5b12692517a39c320f99a479eb055.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d900531973c546625694146fa1509ab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d077f6da8b2c00b152d4679aa2ed7f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fbfcae2cecc98e2d6c16dde6d3ec1c1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/8/a61eb106-2291-428e-9901-01ad18966288.png?resizew=164)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d3f076d3f5a78fc081c252e9a55d5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47d294d69caac577339f11f477b2047e.png)
您最近一年使用:0次
2020-03-31更新
|
394次组卷
|
2卷引用:浙江省湖州市长兴县、德清县、安吉县2019-2020学年高二上学期期中联考数学试题
7 . 如图,三棱柱
所有的棱长均为1,
.
![](https://img.xkw.com/dksih/QBM/2018/12/8/2092512640966656/2094040978153472/STEM/83c34ec2d57d4ca8be0ccd9fe4890900.png?resizew=186)
1
求证:
;
2
若
,求直线
和平面
所成角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ede6a60cad0e0b58e1549fda6e085719.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0238beea11a4fccb8d71e0dca96e21a.png)
![](https://img.xkw.com/dksih/QBM/2018/12/8/2092512640966656/2094040978153472/STEM/83c34ec2d57d4ca8be0ccd9fe4890900.png?resizew=186)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d71379442f28c038d367d49422cf90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c36350b6a9239f9e9ac4fd65594f4ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d71379442f28c038d367d49422cf90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d66384d82516050e91759940c7d3465.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bebb9d0950db392cbe960641f648df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/075e36592397038ffadf495e3e75bba1.png)
您最近一年使用:0次
2018-12-10更新
|
624次组卷
|
2卷引用:浙江省湖州市2018届高三下学期高考适应性考试数学试题
解题方法
8 . 如图,在四棱锥
中,底面
是平行四边形,
平面
,且
,
,
,
.
![](https://img.xkw.com/dksih/QBM/2018/3/4/1895083903508480/1897052318195712/STEM/df7869a430d64cb6bb2be48a36cafea8.png?resizew=224)
(1)求证:
;
(2)若
为
上一点,且二面角
的余弦值为
,求
的长.
![](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/ced06b71073e1bb777f326f06016ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0402dd5ae3db10281f9f1e11738bcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05740f0c6071846227dc0ec177ad15e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcc532cfe64300cb3da9e04a307c957a.png)
![](https://img.xkw.com/dksih/QBM/2018/3/4/1895083903508480/1897052318195712/STEM/df7869a430d64cb6bb2be48a36cafea8.png?resizew=224)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bafa8c14100a4f847b41b9148954116c.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cdd8521672f5429b4ab266502386cdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3aace91caec728e174daec29a3568ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3525ddc5153fada64eaf14e50b536542.png)
您最近一年使用:0次
2018-03-07更新
|
863次组卷
|
2卷引用:浙江省湖州、衢州、丽水三地市2017-2018学年高二上学期期末考试数学试题
9 . 已知
是底面边长为1的正四棱柱,且
,
是
与
的交点.
![](https://img.xkw.com/dksih/QBM/2018/3/4/1895083903508480/1897052318023680/STEM/9891b8ed06984dd4b276f0f2c49c1cc4.png?resizew=213)
(1)若
是
的中点,求证:
平面
;
(2)设
与底面
所成的角的大小为
,二面角
的大小为
,求
的值.
![](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/23f919bd3dde10dbbc076f7ec5149699.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1f229274a6e17977cc047814212589.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cfbc0b5a8fbde804bd8425a4b76d207.png)
![](https://img.xkw.com/dksih/QBM/2018/3/4/1895083903508480/1897052318023680/STEM/9891b8ed06984dd4b276f0f2c49c1cc4.png?resizew=213)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b470c4e195cf7a07b7a331ce4b436e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c88a9de63d3f31fba09974b34ad5687b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ebb05874eb3353d754af24c9974273e.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b470c4e195cf7a07b7a331ce4b436e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632f2bf1cd0435041fa04b01901d1c8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a37f61e228d77116e392ed227f102b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae508022344cb19c405a5b90118d3753.png)
您最近一年使用:0次
2018-03-07更新
|
724次组卷
|
3卷引用:浙江省湖州、衢州、丽水三地市2017-2018学年高二上学期期末考试数学试题
名校
解题方法
10 . 如图,正四棱锥
,记异面直线
与
所成角为
,直线
与面
所成角为
,二面角
的平面角为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e45bcd8f6ede8cc2513ad41402f40086.png)
![](https://img.xkw.com/dksih/QBM/2018/3/4/1895083903508480/1897052317745152/STEM/3fd444b7a5724c4a9f97415c4e547d89.png?resizew=224)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b796bbaeb8450404c2d146283562006e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f435efcc7869eec21bdba1ed81dc3f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e45bcd8f6ede8cc2513ad41402f40086.png)
![](https://img.xkw.com/dksih/QBM/2018/3/4/1895083903508480/1897052317745152/STEM/3fd444b7a5724c4a9f97415c4e547d89.png?resizew=224)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2018-03-07更新
|
510次组卷
|
6卷引用:浙江省湖州、衢州、丽水三地市2017-2018学年高二上学期期末考试数学试题