1 . 如图,直四棱柱
的底面是菱形,
,E,M,N分别是BC,
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/20/6ae5869f-fcc1-40ad-8bdf-842f67d57d8d.png?resizew=178)
(1)证明:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0aa142bb96af98b846997e681609739f.png)
(2)证明:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
平面
;
(3)求二面角
的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d19b6bccaa2a17808d1533aa136c17e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3726450efcb4a70c6ffcb611ab58e9e7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/20/6ae5869f-fcc1-40ad-8bdf-842f67d57d8d.png?resizew=178)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0aa142bb96af98b846997e681609739f.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638537c0a30676c73fea76c80e0f8bd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb5a463a03c549b0dba6d90e7f16a2af.png)
(3)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61f145b8eaf09812b3abb946ab435eb4.png)
您最近一年使用:0次
名校
2 . 如图,四棱锥
中,底面
是矩形,
,
.
为
上的点,且
平面
;
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/11/b058fcce-a7e2-4bb8-8e4f-1c937e0838af.png?resizew=161)
(1)求证:
平面
;
(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/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffddeafce03aae663bc823e2d5127c61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93451ea7ec8499b913753dbc32191d43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d0edb1508fc95765f3bb316bcb5252d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10ca5b5fd1031438de2d2dd59be8c348.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/11/b058fcce-a7e2-4bb8-8e4f-1c937e0838af.png?resizew=161)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1b49f64e0065edad868b25e9fcada3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7b312de408dda638ca3e9c687549d46.png)
您最近一年使用:0次
2022-11-26更新
|
518次组卷
|
3卷引用:吉林省辽源市第五中学校2022-2023学年高三上学期期中数学试题
解题方法
3 . 如图,在四棱锥
中,底面
为矩形,
平面
,
,
为
中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/6/07855c7d-24eb-4423-8e07-beee009bd930.png?resizew=166)
(1)证明:
平面
.
(2)证明:
平面
.
![](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/e3f6967901d6c855864df01e7bf7a15c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/6/07855c7d-24eb-4423-8e07-beee009bd930.png?resizew=166)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/307807ee10071bafbe922eb18d2517d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f4c3f9dd5d0343597a7f58a1989b537.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
您最近一年使用:0次
2023-04-05更新
|
836次组卷
|
6卷引用:吉林省通化市梅河口市博文学校2022-2023学年高一下学期第二次月考数学试题
解题方法
4 . 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
5 . 如图,在三棱锥
中,平面
平面ABC,
,
,
,
,D是棱PC的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/14/6517ab49-40bf-423a-a02e-7159091f0c0e.png?resizew=167)
(1)求证:
;
(2)若
,求直线BC与平面ADB所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4aa9084b8fe0fe05c4388d1f835587b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb8c91e4c85a9da7f54b2237d870a50d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e26a42b05e06fe34d66538930787bb3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3e7f748d88b4eadfd1643c6b31fdf08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22e766e52e5f64705a847ff1dbaba69c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/14/6517ab49-40bf-423a-a02e-7159091f0c0e.png?resizew=167)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d900531973c546625694146fa1509ab9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29e240a6378adf6d23ebf9cc710c9bd6.png)
您最近一年使用:0次
2023-02-10更新
|
1483次组卷
|
9卷引用:吉林省长春市绿园区新解放学校2022-2023学年高二下学期期末数学试题
名校
6 . 如图,在直四棱柱
中,底面
是正方形,
,
为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/3/6e2da271-a43f-4ef2-8a3b-d4249c10ad3a.png?resizew=140)
(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/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f21c7c194c5bc2986a21fd441c81495.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22adbc0da438220f9cace11b629d799b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/3/6e2da271-a43f-4ef2-8a3b-d4249c10ad3a.png?resizew=140)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44b190c8d3d7d7d0e6e959e8a52eae90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd823da794135c17889c2a2d42d0a149.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd823da794135c17889c2a2d42d0a149.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea55a7e39361987096953d3a3ee1eaa4.png)
您最近一年使用:0次
2023-01-16更新
|
228次组卷
|
3卷引用:吉林省白城市通榆县2022-2023学年高二上学期期末数学试题
名校
7 . 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
|
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
8 . 如图,在四棱锥
中,底面
是矩形且
,
为
的中点,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/3/a681a791-3d85-4d6f-bda0-77d11038304d.png?resizew=188)
(1)证明:
平面
;
(2)若
,
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/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1affed1ad8e53a73308c85849a72444.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db27b7f29d7d01b2692f217bc3079fc4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66255baca88d896a61321a72cad75699.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/3/a681a791-3d85-4d6f-bda0-77d11038304d.png?resizew=188)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced06b71073e1bb777f326f06016ce17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1e5fa72f2878b476bc57f0df12d6555.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c745df4f226027778d5fe45b6501b822.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
您最近一年使用:0次
名校
解题方法
9 . 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
名校
10 . 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