名校
解题方法
1 . 在如图所示的四棱锥
中,
,
,
,
,
,且
,则直线
与平面
所成角的正弦值为( )
![](https://img.xkw.com/dksih/QBM/2021/3/30/2689209157074944/2800804757897216/STEM/1cd6084e-2fe7-4dd4-9b2c-8ec688effc09.png?resizew=231)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f79863ffcfa63117ca6741b20a48e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ce0045d054301b44ae94fbbf8247cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cbb05b8b630052ff544249ebd72d95d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3b10835116b9b777a666b438c907b49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8871805b528cf98e9961f6a1fb2d663.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/feb67f27bcda7681b19239a199b4c4d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
![](https://img.xkw.com/dksih/QBM/2021/3/30/2689209157074944/2800804757897216/STEM/1cd6084e-2fe7-4dd4-9b2c-8ec688effc09.png?resizew=231)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2021-09-04更新
|
666次组卷
|
3卷引用:河南省商丘市安阳市部分高中2020-2021学年高二下学期第二次联考数学(理科)试题
河南省商丘市安阳市部分高中2020-2021学年高二下学期第二次联考数学(理科)试题安徽省合肥市第六中学2021-2022学年高二上学期10月单元教学评价数学试题(已下线)第04讲 空间向量的应用(4大考点)-2022-2023学年高二数学考试满分全攻略(人教A版2019选择性必修第一册)
名校
解题方法
2 . 在三棱柱
中,
,
平面
,
,
,
,则异面直线
与
所成角的余弦值为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36c4559d27e3905980d1a4f1856f07de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5845ccc0d735dc14c92a8926d9b1def6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68b40d0d2f3cdd8981bb792ad87efb42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca036d049f5205cf04cb1b9c5cd03f97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92535536bd3c2761724fd058427f95a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d8772aa893a9c1d40f714cb25701701.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ee8456443402a25b1e25d35ff7e1c98.png)
您最近一年使用:0次
2021-08-16更新
|
323次组卷
|
3卷引用:河南省商丘市安阳市部分高中2020-2021学年高二下学期第二次联考数学(理科)试题
解题方法
3 . 如图,在正四棱柱
中,
,
,点
在棱
上,且
平面
.
![](https://img.xkw.com/dksih/QBM/2021/7/1/2755076699996160/2780175259557888/STEM/fe5de67c4fa144fc984c42265a632032.png?resizew=176)
(1)求
的值;
(2)若
,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d27bd71d79cb19eb554175e4ef0867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f3e58edd1f900ca82bb2a3058293f52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74827ace228023ae8bdf649a4517c3dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c54d01623f09f23103f03ba1135fc6a.png)
![](https://img.xkw.com/dksih/QBM/2021/7/1/2755076699996160/2780175259557888/STEM/fe5de67c4fa144fc984c42265a632032.png?resizew=176)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4aa79f184c714c04b66c746577a5afb.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04d6913779892aae19b6b3f8658c1512.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1d9cb67314af122defeaa715365a9a7.png)
您最近一年使用:0次
2021-08-06更新
|
432次组卷
|
3卷引用:河南省商丘市部分学校2020-2021学年高二下学期期末考试理科数学试题
4 . 如图,在正三棱柱
中,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/15/424ca66c-a69a-48d8-a973-6c4655aaf5b3.png?resizew=130)
(Ⅰ)证明:
平面
;
(Ⅱ)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d727264c9c409450d25c91a6148f5f2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d1cdccb66438851d1c6e602837879ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c571707cfe336c15d9675465c08c46bf.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/15/424ca66c-a69a-48d8-a973-6c4655aaf5b3.png?resizew=130)
(Ⅰ)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/662698361c6b3ddaf0c28a3c87be53e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/589c878e789e07e33d65c8a18cf2c58a.png)
(Ⅱ)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b051f51b7d4ce0a3a6d0b7eb880a2fbf.png)
您最近一年使用:0次
2021-06-22更新
|
446次组卷
|
4卷引用:河南省商丘市部分学校联考2020-2021学年高二下学期阶段性测试(五)理科数学试题
河南省商丘市部分学校联考2020-2021学年高二下学期阶段性测试(五)理科数学试题(已下线)考点35 空间向量与立体几何-备战2022年高考数学(理)一轮复习考点帮(已下线)第1章 空间向量与立体几何 章末测试(基础)-2021-2022学年高二数学一隅三反系列(人教A版2019选择性必修第一册)湖南省永州市宁远县明德湘南中学2022-2023学年高二上学期第一次月考数学试题
5 . 如图,在三棱锥
中,平面
平面
,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/26/ab81a773-66f6-45b8-ae29-00e739aeafbb.jpg?resizew=203)
(1)证明:
;
(2)若
,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d077f6da8b2c00b152d4679aa2ed7f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7284003d7791f70b5a58c36cc24971b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c64ba26399dfb1233bea8cf59da2dad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa7aeb2a8d1437eeb4482c3b6ad9f315.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08aa6fd52f3933cbded9ce8c880b4a10.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/26/ab81a773-66f6-45b8-ae29-00e739aeafbb.jpg?resizew=203)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bce7fa1a53ed0dd245c4fcf13e7bee8d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2231f7baf3a56ab38c49d32f3faca21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b33b7213d99a817bff19bcf740a0697c.png)
您最近一年使用:0次
名校
解题方法
6 . 如图,在直棱柱
中,底面
是边长为2的菱形,
,
.点
是线段
上的动点(不含端点).
![](https://img.xkw.com/dksih/QBM/2021/5/18/2723948993544192/2734951912636416/STEM/51f013d2300f4296a55fae0e40897b6c.png?resizew=140)
(1)当
时,求
的值;
(2)求平面
与平面
所成锐二面角的余弦值的取值范围.
![](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/7bb8fb552b9e21dbaba74d11aa747790.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92535536bd3c2761724fd058427f95a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83c09eec4e14a861af83d7828797d176.png)
![](https://img.xkw.com/dksih/QBM/2021/5/18/2723948993544192/2734951912636416/STEM/51f013d2300f4296a55fae0e40897b6c.png?resizew=140)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/364a55c81b4946a88f71a39f9f34ab1e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec3d7d2292f3d958894dcd83f0de423b.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/500df0e782bb081e608f4bc1d576afcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3e0dba5705e1d749cfb21ebbb2ed93.png)
您最近一年使用:0次
解题方法
7 . 如图,在四棱锥
中,底面
为直角梯形,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/12/c6fcd365-155c-4a5d-ac29-57d658ebaa33.png?resizew=149)
(1)证明:平面
平面
.
(2)若
,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8e7cedc39297d66dbb177f2a1f6bee2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65c42bce098904b241986bb91c65ab33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cde22e40db8a575a4bdffe9e3dc93a9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3b637b4b267519a3e03900089a2384b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ad8197e99608b6d31131e54287e1fa1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d10b6175fb056760a9357936d14ffe82.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/12/c6fcd365-155c-4a5d-ac29-57d658ebaa33.png?resizew=149)
(1)证明:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3d7090639341730951c1bc3c9b6164e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c66d99a6a8415ddad22bbed33b64cfb.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10c013bbe1fb6e9acf461548b5cf6cd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8aad963ee7cdc7ff35a8dd23685589d1.png)
您最近一年使用:0次
2021-03-28更新
|
115次组卷
|
5卷引用:河南省商丘市安阳市部分高中2020-2021学年高二下学期第二次联考数学(理科)试题
名校
8 . 如图(1),在平面四边形ABCD中,AC是BD的垂直平分线,垂足为E,AB中点为F,
,
,
,沿BD将
折起,使C至
位置,如图(2).
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/6/e8b2bd3a-b9ba-423f-ab97-c490b12cab2c.png?resizew=334)
(1)求证:
;
(2)当平面
平面ABD时,求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d70dc2c20619a4fc12a0cfda59af5b69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/714cc3707bba3bfdb56e251999be8592.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e320a45fdb0f3339eff27dd0c608117.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7df6d51738ac1bc8b9530ea4a55745c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c8a9c4957431681ddfc77895a88508.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/6/e8b2bd3a-b9ba-423f-ab97-c490b12cab2c.png?resizew=334)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/555dfe77eeb168a880694e22bd9acbdd.png)
(2)当平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/583dc7946f12e23433a9d9217a861adc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4c92b5799d12ea37de46d7c942ce7a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef2d7607c3e2f43ac86312a263018764.png)
您最近一年使用:0次
2019-12-21更新
|
383次组卷
|
2卷引用:河南省商丘市第一高级中学2020-2021学年高二下学期3月月考数学理科试题