1 . 如图,在圆锥
中,已知
的直径
的中点.
![](https://img.xkw.com/dksih/QBM/2014/5/22/1571734572580864/1571734578470912/STEM/b2a6ed50-3f10-4f9e-9beb-2867593916fc.png?resizew=238)
(1)证明:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adec05260cb32350463ec97607b9d0a1.png)
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef49a3ca580a144cc65a609c167facc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7648f049cc17a82fe816f5de3d9693c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5c6af2604ff0f121c696eb2876f023f.png)
![](https://img.xkw.com/dksih/QBM/2014/5/22/1571734572580864/1571734578470912/STEM/b2a6ed50-3f10-4f9e-9beb-2867593916fc.png?resizew=238)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adec05260cb32350463ec97607b9d0a1.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12a4bddf1ea3c5d37f2233a4821909e9.png)
您最近一年使用:0次
2016-12-03更新
|
3405次组卷
|
4卷引用:江苏省南京市第十二中学2021-2022学年高二下学期3月学情调研数学试题
解题方法
2 . 如图,四棱锥P﹣ABCD中,PA⊥平面ABCD,底面ABCD为矩形,E,F分别为棱AB,PC的中点
![](https://img.xkw.com/dksih/QBM/2016/1/25/1572464571105280/1572464577224704/STEM/7a679be1-f08b-4775-9b1e-453a5b3a69e7.png?resizew=173)
(1)求证:PE⊥BC;
(2)求证:EF
平面PAD.
![](https://img.xkw.com/dksih/QBM/2016/1/25/1572464571105280/1572464577224704/STEM/7a679be1-f08b-4775-9b1e-453a5b3a69e7.png?resizew=173)
(1)求证:PE⊥BC;
(2)求证:EF
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c8cf209933f202dbac6e66d9137b4fb.png)
您最近一年使用:0次
2014·江苏南京·一模
名校
解题方法
3 . 如图,在正三棱柱
中,
分别为
中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/16/bff572d3-2d96-4da6-8dff-024586ecf19e.png?resizew=137)
(1)求证:
平面
;
(2)求证:平面
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad056c25c0fdcbcc765eb5cbc6093f2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b74373a614731cbf61af14e6e0dae21b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/16/bff572d3-2d96-4da6-8dff-024586ecf19e.png?resizew=137)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9d32e76582bf550593fdef53e081225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69c6b5fe2690ea3575e84b23585f4692.png)
(2)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0532c912a8b7953d35c6aac416478325.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d9a8181f7a7fe7f3fac872ce9534f15.png)
您最近一年使用:0次
2016-12-03更新
|
2009次组卷
|
13卷引用:2014届江苏南京市、盐城市高三第一次模拟考试理数学试卷
(已下线)2014届江苏南京市、盐城市高三第一次模拟考试理数学试卷(已下线)2014届江苏南京市、盐城市高三第一次模拟考试文数学试卷2014-2015学年江苏省东台市安丰中学高一下学期期中考试数学试卷2016届江苏省海头高级中学高三12月月考数学试卷江苏省盐城市伍佑中学2019-2020学年高一下学期期中数学试题2015-2016学年江西吉安一中高二上第一次段考文科数学卷黑龙江省哈尔滨市宾县第一中学2020-2021学年高三上学期第三次月考数学(文)试题江西省九江市柴桑区一中2020-2021学年高二上学期数学(理)期中试题江西省九江市柴桑区一中2020-2021学年高二上学期数学(文)期中试题上海市青浦区2023届高三一模数学试题上海市复兴高级中学2023-2024学年高二上学期数学期末考试数学试卷(已下线)艺体生一轮复习 第七章 立体几何 第34讲 空间中的垂直关系【讲】上海市浦东新区上海实验学校2024届高三下学期开学考试数学试题
4 . 已知三棱锥
中,
平面
,
,
为
中点,
为
的中点,
![](https://img.xkw.com/dksih/QBM/2015/5/4/1572093330456576/1572093336150016/STEM/98c1af050d944c76b8026452c8d63378.png)
(1)求证:
平面
;
(2)求证:平面
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.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/2015/5/4/1572093330456576/1572093336150016/STEM/98c1af050d944c76b8026452c8d63378.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6a6b190811e7735c33b1177ba2c0de0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a32bd7a1b78b5a0ec562c4025aea8c.png)
(2)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec43f7352b3a8c194b4c37485fb4ffd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
您最近一年使用:0次
5 . 过抛物线
的焦点F作斜率分别为
的两条不同的直线
,且
,
相交于点A,B,
相交于点C,D.以AB,CD为直径的圆M,圆N(M,N为圆心)的公共弦所在的直线记为
.
(I)若
,证明;
;
(II)若点M到直线
的距离的最小值为
,求抛物线E的方程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a69ab234c3a8a40a9d0a9620df498af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90963760acac7bfad3ae03088c6c80b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44434b647ec546fe787e2164e0be6cd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ec7bcf5820dfe70290259c2d7ac1ea5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe42865a8ca3fe91e104273a4174e079.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f46fbee1091c01d2752d3ec2e804bf9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
(I)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90931781b834d100def5e571c28486db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc119913022c0911844ab30307982a41.png)
(II)若点M到直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97814cbb7a07b2e5726d144f97ebf444.png)
您最近一年使用:0次
2016-12-02更新
|
3126次组卷
|
3卷引用:江苏省镇江中学2019-2020学年高二上学期第一次月考数学试题
6 . 已知
菱形
所在平面,点
、
分别为线段
、
的中点.
![](https://img.xkw.com/dksih/QBM/2015/2/5/1571979311325184/1571979317157888/STEM/751eb3cb1b954a59bfd4de685bee9d85.png)
(Ⅰ)求证:
;
(Ⅱ)求证:
∥平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/551e4cd76a93de89ea2750160fe74923.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://img.xkw.com/dksih/QBM/2015/2/5/1571979311325184/1571979317157888/STEM/751eb3cb1b954a59bfd4de685bee9d85.png)
(Ⅰ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8606472edf34185e67ab493af7e06f32.png)
(Ⅱ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b37793a3a810e823e10c340986f55ddd.png)
您最近一年使用:0次
2011·江苏泰州·一模
7 . 已知四面体
中,
,平面
平面
,
分别为棱
和
的中点.
![](https://img.xkw.com/dksih/QBM/2015/1/6/1571951138316288/1571951144083456/STEM/f5858262611849c39d51dbcae8bc947d.png)
(1)求证:
平面
;
(2)求证:
;
(3)若
内的点
满足
∥平面
,设点
构成集合
,试描述点集
的位置(不必说明理由)
![](https://img.xkw.com/dksih/QBM/2015/1/6/1571951138316288/1571951144083456/STEM/aa0a956b5de646dcb61c7cdef55e0a05.png)
![](https://img.xkw.com/dksih/QBM/2015/1/6/1571951138316288/1571951144083456/STEM/2fb5c8f37244465c9cc0c254c2f9d131.png)
![](https://img.xkw.com/dksih/QBM/2015/1/6/1571951138316288/1571951144083456/STEM/ed9b453916ca48dda353543da37562d6.png)
![](https://img.xkw.com/dksih/QBM/2015/1/6/1571951138316288/1571951144083456/STEM/5519e6f905e64b54aa52165c09662b61.png)
![](https://img.xkw.com/dksih/QBM/2015/1/6/1571951138316288/1571951144083456/STEM/f7b5bd1ec00948fcb635fc61203301cd.png)
![](https://img.xkw.com/dksih/QBM/2015/1/6/1571951138316288/1571951144083456/STEM/91a9350c3c0a447291e9f470d624e166.png)
![](https://img.xkw.com/dksih/QBM/2015/1/6/1571951138316288/1571951144083456/STEM/0cf8e1ac5b084388a86787a4696caaca.png)
![](https://img.xkw.com/dksih/QBM/2015/1/6/1571951138316288/1571951144083456/STEM/f5858262611849c39d51dbcae8bc947d.png)
(1)求证:
![](https://img.xkw.com/dksih/QBM/2015/1/6/1571951138316288/1571951144083456/STEM/b9f3cca15773452e8b2f38285790bf5f.png)
![](https://img.xkw.com/dksih/QBM/2015/1/6/1571951138316288/1571951144083456/STEM/5519e6f905e64b54aa52165c09662b61.png)
(2)求证:
![](https://img.xkw.com/dksih/QBM/2015/1/6/1571951138316288/1571951144083456/STEM/7c529b587925474a81db0e3ad62e307d.png)
(3)若
![](https://img.xkw.com/dksih/QBM/2015/1/6/1571951138316288/1571951144083456/STEM/00deb7b0151c486da4a27a288e0e12f4.png)
![](https://img.xkw.com/dksih/QBM/2015/1/6/1571951138316288/1571951144083456/STEM/efc6abe1afea42d5826e960a0e18931a.png)
![](https://img.xkw.com/dksih/QBM/2015/1/6/1571951138316288/1571951144083456/STEM/e4ed4eb2090c461c8fdb7834f7f725a1.png)
![](https://img.xkw.com/dksih/QBM/2015/1/6/1571951138316288/1571951144083456/STEM/5519e6f905e64b54aa52165c09662b61.png)
![](https://img.xkw.com/dksih/QBM/2015/1/6/1571951138316288/1571951144083456/STEM/efc6abe1afea42d5826e960a0e18931a.png)
![](https://img.xkw.com/dksih/QBM/2015/1/6/1571951138316288/1571951144083456/STEM/22929a9bd04a4279af56290a47a6d830.png)
![](https://img.xkw.com/dksih/QBM/2015/1/6/1571951138316288/1571951144083456/STEM/22929a9bd04a4279af56290a47a6d830.png)
您最近一年使用:0次
2014·江苏南通·三模
名校
解题方法
8 . 如图,在五面体ABCDEF中,四边形ABCD是矩形,DE⊥平面ABCD.
(1)求证:AB∥EF;
(2)求证:平面BCF⊥平面CDEF.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/10/9493763a-8ba7-455f-af40-50ad2522480e.png?resizew=158)
(1)求证:AB∥EF;
(2)求证:平面BCF⊥平面CDEF.
您最近一年使用:0次
2016-12-03更新
|
1838次组卷
|
5卷引用:2014届江苏省南通市高三年级第三次模拟考试理科数学试卷
(已下线)2014届江苏省南通市高三年级第三次模拟考试理科数学试卷(已下线)2014届江苏省南通市高三年级第三次模拟考试文科数学试卷江苏省南通市通州区石港中学2022-2023学年高一下学期第三次阶段检测数学试题江苏省南通市通州区金沙中学2022-2023学年高一下学期5月质量监测数学试题2016-2017学年河北定州中学高二上周练二数学试卷
9 . 已知正方形ABCD的边长为2,AC∩BD=O.将正方形ABCD沿对角线BD折起,使AC=a,得到三棱锥A-BCD,如图所示.
![](https://img.xkw.com/dksih/QBM/2014/4/1/1571594845339648/1571594850795520/STEM/5a930ebf8b6d4d54be4b195fb0ed506b.png?resizew=246)
(1)当a=2时,求证:AO⊥平面BCD.
(2)当二面角A-BD-C的大小为120°时,求二面角A-BC-D的正切值.
![](https://img.xkw.com/dksih/QBM/2014/4/1/1571594845339648/1571594850795520/STEM/5a930ebf8b6d4d54be4b195fb0ed506b.png?resizew=246)
(1)当a=2时,求证:AO⊥平面BCD.
(2)当二面角A-BD-C的大小为120°时,求二面角A-BC-D的正切值.
您最近一年使用:0次
2016-12-02更新
|
1931次组卷
|
9卷引用:江苏省南京市江浦高级中学2020-2021学年高二上学期检测(一)数学试题
江苏省南京市江浦高级中学2020-2021学年高二上学期检测(一)数学试题(已下线)2012届河南省南阳市一中高三春期第九次周考理科数学试卷(已下线)2013届浙江省温州中学高三10月月考理科数学试卷(已下线)2014年高考数学全程总复习课时提升作业四十九第七章第八节练习卷人教A版(2019) 必修第二册 过关斩将 第八章 专题强化练7 折叠问题人教B版(2019) 必修第四册 过关斩将 第十一章 立体几何初步 专题强化练3 折叠问题+专题强化练4 空间角的有关计算陕西省西安市第一中学2020-2021学年高二上学期期中数学(理)试题北师大版 必修2 过关斩将 第一章 立体几何初步 专题强化练3 平行关系的探索问题 强化练4 折叠问题安徽省池州市第一中学2021-2022学年高一下学期5月月考数学试题
10 . 如图,四边形ABCD是矩形,平面ABCD⊥平面BCE,BE⊥EC.
![](https://img.xkw.com/dksih/QBM/2014/3/25/1571575357480960/1571575362912256/STEM/ec8ed392bce94279a2e6508c9490c53f.png)
(1)求证:平面AEC⊥平面ABE;
(2)点F在BE上.若DE∥平面ACF,求
的值.
![](https://img.xkw.com/dksih/QBM/2014/3/25/1571575357480960/1571575362912256/STEM/ec8ed392bce94279a2e6508c9490c53f.png)
(1)求证:平面AEC⊥平面ABE;
(2)点F在BE上.若DE∥平面ACF,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4f94ad6cf5f11c1fedb78462429c774.png)
您最近一年使用:0次
2016-12-02更新
|
1151次组卷
|
3卷引用:2014年高考数学(文)二轮复习专题提升训练江苏专用20练习卷
(已下线)2014年高考数学(文)二轮复习专题提升训练江苏专用20练习卷2019届江苏省姜堰中学、前黄高级中学、淮阴中学、溧阳中学高三下学期4月阶段测试数学试题江苏省淮安市淮阴中学、姜堰中学2018-2019学年高三下学期4月阶段测试数学试题