1 . 如图,已知多面体
中,
,
平面
,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/6/77d0ea08-1a33-4893-9fa9-28dc3bd458f0.png?resizew=146)
(Ⅰ)证明:
平面
;
(Ⅱ)求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea1e3a43d0fa18f6c0888ba804d5b329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0facf189b2a3153beb7b9e077d3b1146.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca5dd496ee0c1170ef6dcc48266ee444.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d5ba108d7d2d4807f2c74a22e536fe9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b80ee363635d73f601654339028daec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42e12bfde565540f059dd27ea47dfaa7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/6/77d0ea08-1a33-4893-9fa9-28dc3bd458f0.png?resizew=146)
(Ⅰ)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c45fbffb9e2c7fa7c5006cde8da0cabe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(Ⅱ)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
您最近一年使用:0次
2019-02-04更新
|
793次组卷
|
4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
2 . 如图所示,在长方体
中,
为
的中点,连接
和
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/10/d3dc67eb-aac3-4fe3-a150-50add7a068df.png?resizew=209)
(1)求证:平面
平面
;
(2)求二面角
的正切值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d052b5122a42824065083ebad1d44523.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fbafedc202bd0d86c4dfdece9f8f4fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/618266e485e3ae62d21d141b02bfc960.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d97dc3b752832906de41447bb58a341.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/10/d3dc67eb-aac3-4fe3-a150-50add7a068df.png?resizew=209)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c940226a2a3388cb1366e5dc942900c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8257b6bd25104e07b9ad935c0a3aac4.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/698c9744e2df4cf8e1be04d0744d2a5b.png)
您最近一年使用:0次
3 . 如图,在几何体ABCDE中,△AED为等边三角形,AB∥CD,∠ABC=90°,∠BAD=60°,AD=AB=2,BE=3.
![](https://img.xkw.com/dksih/QBM/2018/12/25/2104354188140544/2107052608847872/STEM/5dd56f6a9c034856b19e6fbaaf7ed790.png?resizew=171)
(Ⅰ)求证:AD⊥BE
(Ⅱ)求直线BE与平面AED所成的角的大小.
![](https://img.xkw.com/dksih/QBM/2018/12/25/2104354188140544/2107052608847872/STEM/5dd56f6a9c034856b19e6fbaaf7ed790.png?resizew=171)
(Ⅰ)求证:AD⊥BE
(Ⅱ)求直线BE与平面AED所成的角的大小.
您最近一年使用:0次
2018-12-29更新
|
272次组卷
|
2卷引用:【校级联考】浙江省湖州市长兴县、安吉县、德清县2018-2019学年高二(上)期中考试数学试题
4 . 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
5 . 已知在矩形
中,
,沿直线BD将△ABD折成
,使得点
在平面
上的射影在
内(不含边界),设二面角
的大小为
,直线
,
与平面
中所成的角分别为
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f12813a857895073cba58f5107ba6112.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2006284762c12b012a0274a0f049351b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f150a3003923f43c558eced3ca565bea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01e04a5b59cced25ab7057d03fe3c0ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee6591f5d23da9e2349295383d662761.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7aed59820c4dacc2c93bbfcc32dbb302.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24edeef3e1eca5a8659543549e909943.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2e027e5015e5412248ecce335b48df5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01e04a5b59cced25ab7057d03fe3c0ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ba83980a38c5e1fe4be841bc8a51d1d.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2018-11-10更新
|
283次组卷
|
10卷引用:2017届浙江省湖州、衢州、丽水三市高三4月联考数学试卷
2017届浙江省湖州、衢州、丽水三市高三4月联考数学试卷【全国百强校】浙江省杭州市学军中学2018年5月高三模拟考试数学试卷(已下线)2018年高考数学母题题源系列【浙江专版】专题八 点线面的位置关系与空间的角浙江省绍兴市诸暨市诸暨中学(实验班)2019-2020学年高二上学期期中数学试题浙江省杭州市学军中学2019-2020学年高三下学期4月月考数学试题浙江省绍兴市上虞区春晖中学2019-2020学年高二特长班上学期10月月考数学试题浙江省“七彩阳光”新高考研究联盟2020-2021学年高二上学期期中联考数学试题(已下线)【新东方】杭州新东方高中数学试卷382(已下线)【新东方】绍兴qw130浙江省温州市“十五校联合体”2018-2019学年高二上学期期中联考数学试题
名校
6 . 如图,四边形
为梯形,
点
在线段
上,满足
,且
,现将
沿
翻折到
位置,使得
.
![](https://img.xkw.com/dksih/QBM/2019/3/26/2169081642885120/2171666268372992/STEM/5e070b6ff5bb45af8c7064a38e931a74.png?resizew=284)
(1)证明:
;
(2)求直线
与面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cb3f9a5da641be35117fd35ba07a6aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76018076fab37f1f7924da5c2b00b0c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1ffb98f1e3c1317c0db403d3af04bdc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/404356b10bbac4eeb9b603cbb26d4e02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a8450404a2d225e7a200d5f679b01ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ae119c3aebd074e7d172542378dbe78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9f79d7939c88e9702962e5917cad290.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/391c718ee9a18155cfe1de650d458c18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/670166ad432c7b8be5b92df36d5f8251.png)
![](https://img.xkw.com/dksih/QBM/2019/3/26/2169081642885120/2171666268372992/STEM/5e070b6ff5bb45af8c7064a38e931a74.png?resizew=284)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc77fb27a5aab9198d996cb53edf3998.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e883f81c66ceef54d2d0556a68ed585.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/391c718ee9a18155cfe1de650d458c18.png)
您最近一年使用:0次
2018-05-05更新
|
1356次组卷
|
6卷引用:2019届浙江省湖州市五校高三模拟考试数学试题
2019届浙江省湖州市五校高三模拟考试数学试题【全国市级联考】浙江省宁波市2018届高三5月模拟考试数学试题(已下线)2018年高考数学母题题源系列【浙江专版】专题八 点线面的位置关系与空间的角【校级联考】河南省顶级名校2019届高三质量测评数学理试题【全国百强校】河南省信阳高级中学2019届高三3月月考数学(理)试题2020年浙江省名校高考仿真训练卷(二)
解题方法
7 . 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
名校
解题方法
8 . 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
9 . 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
10 . 在四棱锥
中,
底面
,底面
为矩形,
,
是
上一点,若
,则
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1b49f64e0065edad868b25e9fcada3.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/5181b97a7e43959b8455680157c3b644.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbfbaf73297240eb116f22489519895a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a205a7eab74e544c9e5635f1ef9e9702.png)
A.![]() | B.![]() | C.![]() | D.4 |
您最近一年使用:0次
2018-01-08更新
|
292次组卷
|
3卷引用:浙江省湖州市菱湖中学2018-2019学年高二12月月考数学试题