11-12高三上·广东揭阳·期末
1 . 如图甲,在平面四边形
中,已知
,
,
,
,现将四边形
沿
折起,使平面![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7abd284f76d9f5769bc189508ce2572b.png)
平面
(如图乙),设点
,
分别为棱
,
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/2/c3cdbb0c-cb01-4604-b403-84badf4e8da7.png?resizew=370)
(1)证明![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
平面
;
(2)求
与平面
所成角的正弦值;
(3)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8dec514927ab13511f5534553a894b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a69550d878381f6e8fb436e88638f070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/386efb61144731e2b148f963f77ca3b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f5fc4ad65b723b6a8da4c8dac154e6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7abd284f76d9f5769bc189508ce2572b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1633988fd62a652de726ee92a917b52d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4739afd7311501e948aa4e1e5c1cb17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/2/c3cdbb0c-cb01-4604-b403-84badf4e8da7.png?resizew=370)
(1)证明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1633988fd62a652de726ee92a917b52d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(3)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/115b32a22c3bfa823fe164d956bb1503.png)
您最近一年使用:0次
2016-12-03更新
|
1024次组卷
|
6卷引用:2015届天津市河西区高三下学期总复习质量调查一理科数学试卷
2015届天津市河西区高三下学期总复习质量调查一理科数学试卷2015届天津市河西区高三下学期总复习质量调查一文科数学试卷(已下线)2011届广东揭阳市高三上学期期末数学卷(已下线)2011届广东省揭阳市调研考试数学理卷(已下线)2011届广东省揭阳市第一中学高三调研检测数学理卷(已下线)2013届广东省韶关市高三4月第二次调研测试数学理科试卷
2014·天津·一模
2 . 如图,已知一四棱锥P-ABCD的底面是边长为1的正方形,且侧棱
底面ABCD,且PC=2,E是侧棱PC上的动点
(1)求四棱锥P-ABCD的体积;
(2)证明:
.
(3)求二面角
的正切值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5f1897a7e856b42f8cee0f286ad913d.png)
(1)求四棱锥P-ABCD的体积;
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84be64d28b1623e71ad989f37336b1f2.png)
(3)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02a7ba7cd0c654714c967a900513ba16.png)
![](https://img.xkw.com/dksih/QBM/2014/7/24/1571826818867200/1571826824732672/STEM/9389067c4f1b4cd78b426f9d32849b4a.png?resizew=204)
您最近一年使用:0次
2016-12-03更新
|
2986次组卷
|
3卷引用:2014届天津市蓟县擂鼓台中高考5月模拟理科数学试卷
3 . 如图,长方体
中,
,G是
上的动点.
(l)求证:平面ADG![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1633988fd62a652de726ee92a917b52d.png)
;
(2)判断
与平面ADG的位置关系,并给出证明;
(3)若G是
的中点,求二面角G-AD-C的大小;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/17d20d9a8058985d9847ddd99046fdb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
(l)求证:平面ADG
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1633988fd62a652de726ee92a917b52d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82b724168afaee2ecddf97257180be18.png)
(2)判断
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
(3)若G是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/10/6609d6c0-f9a4-47a1-8f4d-e37bc2936a42.png?resizew=209)
您最近一年使用:0次
2011·北京朝阳·一模
名校
4 . 如图,在四棱锥
中,底面
为直角梯形,且
,
,侧面
底面
. 若
.
(1)求证:
平面
;
(2)侧棱
上是否存在点
,使得
平面
?若存在,指出点
的位置并证明,若不存在,请说明理由;
(3)求二面角
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/34e0a957a55460c72673c0f2ee90dbb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8efa6508d6820f972de28c360aea7504.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93edc7bb513f40a89173121c8570cd65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/460516ee9c61f1bdd231759be0033e80.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97f30533da2e1d2a958dc906c37eba9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
(2)侧棱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c372d059202ec388960b125d4a87dc84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(3)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e867e5c7ef4da37d8985ce82022060e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/17/2e2a8b06-0a67-4422-b704-0ce085dc1db7.png?resizew=200)
您最近一年使用:0次
2016-12-02更新
|
847次组卷
|
8卷引用:天津市蓟州区第一中学2021届高三下学期模拟检测二数学试题
天津市蓟州区第一中学2021届高三下学期模拟检测二数学试题(已下线)2011届北京市朝阳区高三第一次综合练习数学理卷(已下线)2012-2013学年广东省广州六中高二上学期期末考试理科数学试卷(已下线)2013-2014学年黑龙江省哈尔滨四中高二下学期期末考试理科数学试卷(已下线)2013届中国人民大学附属中学高考冲刺二理科数学试卷北京市人大附中2018届高三高考数学(理科)零模试题湖南省衡阳市第一中学2020-2021学年高三上学期第五次月考数学试题(已下线)江苏省苏州市吴江区2019-2020学年高二下学期期中联考数学试题
11-12高三·天津·阶段练习
解题方法
5 . 如图,
垂直于矩形
所在的平面,
分别是
、
的中点.
(1)求证:
平面
;
(2)求证:平面
平面
;
(3)求二面角
的大小.
![](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/addfe61757681c8e8e021259417fb42e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dcafa398cc6b6079883e7ad153eb62d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9068f29d671d76d1e95ba3a4eaff5b96.png)
(2)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22583ac400216f5aa56a84284efe4b12.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
(3)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9e45050779cce642cf41c57de96ba12.png)
![](https://img.xkw.com/dksih/QBM/2012/2/15/1570740400070656/1570740405542912/STEM/4511b9d31363498fb0dc16067828bc84.png?resizew=280)
您最近一年使用:0次
6 . 如图,在五面体ABCDEF中,FA
平面ABCD, AD//BC//FE,AB
AD,M为EC的中点,AF=AB=BC=FE=
AD
(1)求异面直线BF与DE所成的角的大小;
(2)证明平面AMD
平面CDE;
(3)求二面角A-CD-E的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1633988fd62a652de726ee92a917b52d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1633988fd62a652de726ee92a917b52d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
(1)求异面直线BF与DE所成的角的大小;
(2)证明平面AMD
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1633988fd62a652de726ee92a917b52d.png)
(3)求二面角A-CD-E的余弦值.
![](https://img.xkw.com/dksih/QBM/2012/2/15/1570739679420416/1570739684990976/STEM/984f0b6a7e2646e58cb1f12a3237924d.png?resizew=212)
您最近一年使用:0次
10-11高三上·江西·阶段练习
7 . 如图,在三棱柱
中,已知
,
,
侧面
.
(Ⅰ)求直线
与底面
所成角正切值;
(Ⅱ)在棱
(不包含端点)上确定一点E的位置,
使得
(要求说明理由);
(Ⅲ)在(Ⅱ)的条件下,若
,求二面角
的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfd76ea038e7be4c99b71a93c916ddec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d14db33ebdb3207f57c15589a4231536.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21f9157fce2a8339d281178c7c0bccbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc6184b191e6da43911e701121517e.png)
(Ⅰ)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/588eb9393564a33552c4b2e8de837ca5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(Ⅱ)在棱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
使得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a7fda523ada8989e466d797b6fcd2e0.png)
(Ⅲ)在(Ⅱ)的条件下,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21ea52361458ce2e49ed0fe99d8e6c02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69cbd2557ef69775b5a883c510091985.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/17/e10faaee-7f80-4862-9840-a8b95fd2195c.png?resizew=212)
您最近一年使用:0次
2016-12-01更新
|
1063次组卷
|
7卷引用:天津市和平区2019-2020学年度第二学期高三年级线上学习阶段性评估检测数学学科试题
天津市和平区2019-2020学年度第二学期高三年级线上学习阶段性评估检测数学学科试题(已下线)2020届天津市和平区高三高考一模数学试题(已下线)2011届江西省白鹭洲中学高三上学期第一次月考数学卷(已下线)2011届福建省莆田十中高三5月月考调理科数学(已下线)2011-2012学年浙江省北仑中学高二上学期八校联考理科数学苏教版(2019) 必修第二册 过关斩将 第13章 13.2.4 平面与平面的位置关系 第2课时 两平面垂直(已下线)8.6.3平面与平面垂直(第2课时平面与平面垂直的性质定理)(精讲)-【精讲精练】2022-2023学年高一数学下学期同步精讲精练(人教A版2019必修第二册)
9-10高三下·天津·阶段练习
解题方法
8 . 如图1,在直角梯形
中,
,
把△
沿对角线
折起后如图2所示(点
记为点
), 点
在平面
上的正投影
落在线段
上, 连接
.
(1) 求直线
与平面
所成的角的大小;
(2) 求二面角
的大小的余弦值.
![](https://img.xkw.com/dksih/QBM/2010/5/13/1569728814948352/1569728820322304/STEM/029daeab59e2404ca263075c9bef11ef.png)
![](https://img.xkw.com/dksih/QBM/2010/5/13/1569728814948352/1569728820322304/STEM/f5c62f2382e544a4a90b8f6f91cd30c6.png)
图1 图2
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d1adb054877c70fd2f619367ed1cf63.png)
把△
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8010e1a73f05117a278860c1c0c7f147.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.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/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
(1) 求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
(2) 求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f8c264ce78243df0bd4f80b87359866.png)
![](https://img.xkw.com/dksih/QBM/2010/5/13/1569728814948352/1569728820322304/STEM/029daeab59e2404ca263075c9bef11ef.png)
![](https://img.xkw.com/dksih/QBM/2010/5/13/1569728814948352/1569728820322304/STEM/f5c62f2382e544a4a90b8f6f91cd30c6.png)
图1 图2
您最近一年使用:0次
9 . 如图,在四棱锥
中,
底面
,
,
是
的中点.
![](https://img.xkw.com/dksih/QBM/2010/8/12/1569812848852992/1569812854104064/STEM/5b94ed5e-1481-4b54-8d05-cb95c8ac2733.png?resizew=253)
(Ⅰ)证明
;
(Ⅱ)证明
平面
;
(Ⅲ)求二面角
的大小.
![](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/3d07644d708a0b08e91fdb71065312c7.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/2010/8/12/1569812848852992/1569812854104064/STEM/5b94ed5e-1481-4b54-8d05-cb95c8ac2733.png?resizew=253)
(Ⅰ)证明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7dac702fe64edf1bc265da4b98cf2a0.png)
(Ⅱ)证明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1b49f64e0065edad868b25e9fcada3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c09afc70f448545336304333d5b5658b.png)
(Ⅲ)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e867e5c7ef4da37d8985ce82022060e.png)
您最近一年使用:0次
2016-11-30更新
|
3471次组卷
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4卷引用:2007年普通高等学校招生全国统一考试文科数学卷(天津)
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