名校
1 . 如图,等腰梯形
中,
//
,
,
,
为
中点,以
为折痕把
折起,使点
到达点
的位置(
平面
).
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/1/bdcc0642-df29-4e9a-b460-4260642233c0.png?resizew=360)
(1)证明:
;
(2)若直线
与平面
所成的角为
,求平面
与平面
夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/834aaab45e1c8eab84e8da1fec705952.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/833cfda415649b832cc136caed392753.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/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6c72495428bbbd12cad3271b0654ee2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01ff27eea7545bb06f9472f91290c54e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/1/bdcc0642-df29-4e9a-b460-4260642233c0.png?resizew=360)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbfbaf73297240eb116f22489519895a.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01ff27eea7545bb06f9472f91290c54e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15615de1a6df206dbd081251f676578e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bec7e56107b5f2f34e420caffd1159b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d0d532d61b1e346ec6f14f6589122c2.png)
您最近一年使用:0次
2023-01-14更新
|
1392次组卷
|
7卷引用:吉林省东北师范大学附属中学2022-2023学年高三下学期第二次模拟考试数学试题
名校
2 . 如图,矩形BDEF所在平面与正方形ABCD所在平面互相垂直,
,
,点P在线段上.下列命题正确的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/28/e5498267-7f18-40f1-b2fb-6f97a4de0c7a.png?resizew=164)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/714cc3707bba3bfdb56e251999be8592.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82773737609e65dea3c5c67099f1b10d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/28/e5498267-7f18-40f1-b2fb-6f97a4de0c7a.png?resizew=164)
A.存在点P,使得直线![]() |
B.存在点P,使得直线![]() |
C.直线DP与平面ABCD所成角的正弦值的取值范围是![]() |
D.三棱锥![]() ![]() |
您最近一年使用:0次
名校
3 . 如图,四棱锥
中,
平面ABCD,底面ABCD是矩形,且
,E为PC中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/31/5567e7ac-41ef-466d-ada4-b7eb0fcb23d5.png?resizew=163)
(1)求证:
平面PCB;
(2)求二面角
的正弦值.
![](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/74efdc0eeaf807007cd717aba8bef2e8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/31/5567e7ac-41ef-466d-ada4-b7eb0fcb23d5.png?resizew=163)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8d2d217e9bcd059908f117dfc4d4259.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ecc407e2b3e9da16eba881fd7a83845a.png)
您最近一年使用:0次
2023-01-13更新
|
287次组卷
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3卷引用:吉林省长春吉大附中实验学校2022-2023学年高二上学期期末数学试题
4 . 在正方体
中,P,Q分别为棱BC和棱
的中点,则下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d9a907ce40a6b908e1cd4fce7e7b098.png)
A.![]() |
B.平面AQP截正方体所得截面为等腰梯形 |
C.![]() |
D.异面直线QP与AC所成的角为60° |
您最近一年使用:0次
5 . 如图,四棱锥
的底面是矩形,
底面
,
,
为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/28/256c95b9-0cb5-4f01-bd3c-0058cc0eb6cf.png?resizew=156)
(1)求证:平面
⊥平面
;
(2)若二面角
为
,求点
到平面
的距离.
![](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/0e7b6d04f024ca05cdfacc8ce9137c15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/28/256c95b9-0cb5-4f01-bd3c-0058cc0eb6cf.png?resizew=156)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
(2)若二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f615c1e601990cde607f0216f715d57b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64eb31601464364be2baf4aa87404bcd.png)
您最近一年使用:0次
2023-01-08更新
|
748次组卷
|
4卷引用:吉林省长春北师大附属学校2021-2022学年高二上学期期中考试数学试题
吉林省长春北师大附属学校2021-2022学年高二上学期期中考试数学试题黑龙江省大庆实验中学2023届高三下学期实验一部5月考前得分训练(四)数学试题(已下线)第09讲 拓展三:二面角的传统法与向量法(含探索性问题,7类热点题型讲练)-【帮课堂】2023-2024学年高二数学同步学与练(人教A版2019选择性必修第一册)(已下线)艺体生一轮复习 第七章 立体几何 第36讲 空间向量在立体几何中的应用【练】
名校
解题方法
6 . 如图所示,在菱形ABCD中,
且AB=2,E为AD的中点,将
沿
折至
,使
,得到如图所示四棱锥
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/27/9933651a-7dab-4bfa-ac15-89cc1cbb7110.png?resizew=288)
(1)求证:平面
平面
;
(2)若P为
的中点,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43a6f36741b86f464be362b12bac13d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fa485cf3776f36aaf4abaadaf30fb85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5d413672162172ff916a9920f20bb98.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e639841f0599ff4acbee6d51456a7889.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a1c9dfba740bb32b6f2e100fe424cd4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/27/9933651a-7dab-4bfa-ac15-89cc1cbb7110.png?resizew=288)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a832b538d0bd5a0051d485fae371a51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/719103f93166bab4828257608e641a9a.png)
(2)若P为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6eb97aff0960e2640314888a38e7169c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02a7ba7cd0c654714c967a900513ba16.png)
您最近一年使用:0次
2023-01-08更新
|
179次组卷
|
2卷引用:吉林省长春市北师大附属学校2021-2022学年高三上学期期初考试数学(理)试题
7 . 如图,四棱锥
中,
平面
,底面
是正方形,
,
为
中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/27/d698b7c4-82df-4b3e-8be3-da7248d33cc8.png?resizew=178)
(1)求证:
平面
;
(2)求平面
和平面
夹角的余弦值.
![](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/99926bf272cd757f0985c69b390ebcce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/27/d698b7c4-82df-4b3e-8be3-da7248d33cc8.png?resizew=178)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8d2d217e9bcd059908f117dfc4d4259.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b60870baa5e3fbc33a749aa5f0a94be.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34be4e71cabf458f17a6cd7f24bc70af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f571a1aac46c6d0cf440c0ec2846bf9.png)
您最近一年使用:0次
解题方法
8 . 如图,在四棱锥
中,
平面
,底面
为正方形,
,
分别为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/26/68106064-7938-4137-8d19-ab4ade6e4596.png?resizew=162)
(1)求证:
平面
;
(2)求直线
与底面
所成角的正弦值;
(3)求平面
与底面
所成的较小角的余弦值.
![](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/c3b10835116b9b777a666b438c907b49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a373959bb9026f8a09845c0b828bf82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f958c3268b6ff8811cf871dc7588a6e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/26/68106064-7938-4137-8d19-ab4ade6e4596.png?resizew=162)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97f30533da2e1d2a958dc906c37eba9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/852aabd89edffc1b94344ff3f1f31ccd.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(3)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b03428a8f91a5674cb8f54766c165f7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
您最近一年使用:0次
名校
9 . 如图,在三棱柱
中,
平面ABC,D为线段AB的中点,
,
,
,三棱锥
的体积为8.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/9/fece132f-d978-4d2b-af7d-3e05b558b38b.png?resizew=195)
(1)证明:
平面
;
(2)求平面
与平面
夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5845ccc0d735dc14c92a8926d9b1def6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea4b6c682d7b0741fb1f12a073394fc3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7bae5203f4b4acf23779114b3466e17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0903d9128a366fd0a774e94e64f4dd67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b7cd40c9d26ada55e07fa71a4b98be7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/9/fece132f-d978-4d2b-af7d-3e05b558b38b.png?resizew=195)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4890e58791814622b87c4d60ea971f54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8dddfef906818cc8ddd00f867b77f227.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74bca84ad86c648d3bb20c8909c8da3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9afac7c616bbb14e1ed428a3c507c7dc.png)
您最近一年使用:0次
2023-01-06更新
|
1022次组卷
|
3卷引用:吉林省(东北师大附中,长春十一高中,吉林一中,四平一中,松原实验中学)五校2023届高三上学期联合模拟考试数学试题
名校
10 . 如图,正方体
的棱长为a,则以下四个结论中,正确的有( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/9/ea79d18e-f974-4342-9f44-b2f26c7c1ee3.png?resizew=177)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/9/ea79d18e-f974-4342-9f44-b2f26c7c1ee3.png?resizew=177)
A.![]() ![]() | B.BD与平面![]() |
C.![]() ![]() | D.异面直线AD与![]() |
您最近一年使用:0次