1 . 如图,AB是圆O的直径,点C是圆O上异于A,B的点,直线PC⊥平面ABC,E,F分别是PA,PC的中点.
(1)记平面BEF与平面ABC的交线为l,试判断直线l与平面PAC的位置关系,并加以证明;
(2)设(1)中的直线l与圆O的另一个交点为D,且点Q满足
.记直线PQ与平面ABC所成的角为θ,异面直线PQ与EF所成的角为α,二面角E﹣l﹣C的大小为β.求证:sinθ=sinαsinβ.
(1)记平面BEF与平面ABC的交线为l,试判断直线l与平面PAC的位置关系,并加以证明;
(2)设(1)中的直线l与圆O的另一个交点为D,且点Q满足
![](https://img.xkw.com/dksih/QBM/2014/5/22/1571735197384704/1571735202594816/STEM/fe360ef4630f4137844de7807a4b52b9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/10/29f8132e-d52b-4bb3-be15-39727acee098.png?resizew=195)
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2016-12-03更新
|
2780次组卷
|
4卷引用:2013年普通高等学校招生全国统一考试理科数学(湖北卷)
13-14高三上·湖南长沙·阶段练习
2 . (1)已知定点
、
,动点N满足
(O为坐标原点),
,
,
,求点P的轨迹方程.
![](https://img.xkw.com/dksih/QBM/2014/1/14/1571480078819328/1571480084373504/STEM/6e6388e4dcba4f61a3839b2d3b5d8533.png?resizew=292)
(2)如图,已知椭圆
的上、下顶点分别为
,点P在椭圆上,且异于点
,直线
与直线
分别交于点
,
![](https://img.xkw.com/dksih/QBM/2014/1/14/1571480078819328/1571480084373504/STEM/1746c4cc0e8e41ac95d2a596df7720fe.png?resizew=353)
(ⅰ)设直线
的斜率分别为
,求证:
为定值;
(ⅱ)当P点运动时,以
为直径的圆是否经过定点?请证明你的结论.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e4e568d9cd57c442f011a787ab8aaf2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/914c2124260496e9307d6448c0c943f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c773be921d91ec2af8d154e1ac958ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/253ec9ace4de04cf25832080b3fa23de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4f2477ed654acc4cb4a257a943eddba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb44422c6bd6222d0ecc06ee75598446.png)
![](https://img.xkw.com/dksih/QBM/2014/1/14/1571480078819328/1571480084373504/STEM/6e6388e4dcba4f61a3839b2d3b5d8533.png?resizew=292)
(2)如图,已知椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb4402aeb853b22f20992156957ef0fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16e4e4c7a79d9d3cdb9ac5949d53e33e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16e4e4c7a79d9d3cdb9ac5949d53e33e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e5c9e1c50e534c196c65a6a86cfec16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fec96b5e74f5c2915a1d34d0fdeb737.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://img.xkw.com/dksih/QBM/2014/1/14/1571480078819328/1571480084373504/STEM/1746c4cc0e8e41ac95d2a596df7720fe.png?resizew=353)
(ⅰ)设直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e5c9e1c50e534c196c65a6a86cfec16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90963760acac7bfad3ae03088c6c80b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b881044b5c73db6fcce110525741b02.png)
(ⅱ)当P点运动时,以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
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12-13高三·江西景德镇·阶段练习
3 . 如图,平面
平面
,
是等腰直角三角形,
,四边形
是直角梯形,
,
,
,
,
分别为
,
的中点.
(I)求证:
平面
.
(II)求直线
和平面
所成角的正弦值.
(III)能否在
上找一点
,使得
平面
?若能,请指出点
的位置,并加以证明;若不能,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31effd1d3f7ce1f6e57be80c7f3af4ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/08313da7b66283d2e0b3987f3e6761f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad3a079cfdcca9acdacecbf08f9f78cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd190c4ce3e95d46416c7e635b5a8e14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a22940cd2a129350c952ad7dc6db924.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/514ab3791431088948816c4ba7514c58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(I)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d468887a6e318a953b9dcc93231db407.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
(II)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1220cf7442bc7658dbd74a845a62dfce.png)
(III)能否在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b46c607b3deac746c0ef3389ad8f65c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/038b331d32c87fbd86c3accec0841fc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad3a079cfdcca9acdacecbf08f9f78cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://img.xkw.com/dksih/QBM/2017/11/3/1809205128200192/1809771536965632/STEM/d1a673bf4913488d8148dd5a7282210c.png?resizew=173)
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4 . 如图,在三棱柱ABC-A1B1C1中,AA1C1C是边长为4的正方形.平面ABC⊥平面AA1C1C,AB=3,BC=5.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/13/4ca3cfb7-fea0-4c1f-b33e-a301806e022c.png?resizew=140)
(Ⅰ)求证:AA1⊥平面ABC;
(Ⅱ)求二面角A1-BC1-B1的余弦值;
(Ⅲ)证明:在线段BC1存在点D,使得AD⊥A1B,并求
的值.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/13/4ca3cfb7-fea0-4c1f-b33e-a301806e022c.png?resizew=140)
(Ⅰ)求证:AA1⊥平面ABC;
(Ⅱ)求二面角A1-BC1-B1的余弦值;
(Ⅲ)证明:在线段BC1存在点D,使得AD⊥A1B,并求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c04c68f1ef1e37534b5bbc7a1f592ef7.png)
您最近一年使用:0次
2016-12-02更新
|
4637次组卷
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30卷引用:2013年全国普通高等学校招生统一考试理科数学(北京卷)
2013年全国普通高等学校招生统一考试理科数学(北京卷)(已下线)2014届上海交大附中高三数学理总复习二空间向量与立体几何练习卷2016-2017学年湖北省重点高中联考协作体高二下学期期中考试数学(理)试卷湖北省宜昌市葛洲坝中学2018届高三9月月考数学(理)试题【全国百强校】江苏省泰州中学2017-2018学年高二6月月考数学(理)试题【全国百强校】宁夏银川一中2019届高三第四次月考数学(理)试题专题11.8 空间向量与立体几何(练)-江苏版《2020年高考一轮复习讲练测》湖南省长沙市长郡中学2017-2018学年高二下学期入学考试数学(理)试题人教A版(2019) 选择性必修第一册 过关斩将 第一章 空间向量与立体几何 专题强化练3 立体几何中的存在性与探究性问题福建省连城县第一中学2020-2021学年高二上学期第一次月考数学试题江西省景德镇一中2020-2021学年高二(2班)上学期期中考试数学试题(已下线)第一章 空间向量与立体几何单元检测(知识达标卷)-【一堂好课】2021-2022学年高二数学上学期同步精品课堂(人教A版2019选择性必修第一册)河北省涞水波峰中学2020-2021学年高二上学期期末数学试题(已下线)专题03 空间向量与立体几何-立体几何中的存在性与探究性问题-2021-2022学年高二数学同步练习和分类专题教案(人教A版2019选择性必修第一册)(已下线)专练9 专题强化练3-立体几何中的存在性与探究性问题-2021-2022学年高二数学上册同步课后专练(人版A版选择性必修第一册)(已下线)期中考试重难点专题强化训练(1)——向量的综合运用-2021-2022学年高二数学单元卷模拟(易中难)(2019人教A版选择性必修第一册+第二册)海南热带海洋学院附属中学2021届高三11月第二次月考数学试题江西省靖安中学2021-2022学年高二上学期第一次月考数学(理)试题苏教版(2019) 选修第二册 名师精选 第六章 空间向量与立体几何云南省弥勒市第一中学2021-2022学年高二上学期第三次月考数学试题安徽省合肥市第八中学2021-2022学年高二下学期平行班开学考理科数学试题河南省濮阳市范县第一中学2021-2022学年高二上学期第二次月考检测数学试题河南省鹤壁市浚县浚县第一中学2021-2022学年高一下学期7月月考数学试题2023版 北师大版(2019) 选修第一册 名师精选卷 第三章 空间向量与立体几何北京市丰台区第十二中学2021-2022学年高二上学期期中数学试题重庆市忠县乌杨中学校2021-2022学年高二上学期期中数学试题云南省曲靖市罗平县第二中学2021-2022学年高二上学期第二次月考数学试题福建省福州市福州中加学校2023-2024学年高二上学期期中数学试题(已下线)第五章 破解立体几何开放探究问题 专题一 立体几何存在性问题 微点1 立体几何存在性问题的解法(一)【基础版】(已下线)【一题多解】存在与否 向量探索
2012·河南·一模
解题方法
5 . 四棱锥P—ABCD中,底面ABCD是矩形,PA
底面ABCD,PA=" AB" =1,AD =2,点M是PB的中点,点N在BC边上移动.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/13/6c03d344-6a12-4db1-96c5-9d3d14b2c7b3.png?resizew=190)
(I)求证:当N是BC边的中点时,MN∥平面PAC;
(Ⅱ)证明,无论N点在BC边上何处,都有PN
AM;
(Ⅲ)当BN等于何值时,PA与平面PDN所成角的大小为45
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1633988fd62a652de726ee92a917b52d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/13/6c03d344-6a12-4db1-96c5-9d3d14b2c7b3.png?resizew=190)
(I)求证:当N是BC边的中点时,MN∥平面PAC;
(Ⅱ)证明,无论N点在BC边上何处,都有PN
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1633988fd62a652de726ee92a917b52d.png)
(Ⅲ)当BN等于何值时,PA与平面PDN所成角的大小为45
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83873a9d782f2588c5eedbfe73f9bc2f.png)
您最近一年使用:0次
名校
6 . 在四棱锥
中,
,
,
和
都是边长为2的等边三角形,设
在底面
的射影为
.
![](https://img.xkw.com/dksih/QBM/2017/3/6/1637836815663104/1637860221419520/STEM/9f3f9bef-f847-4992-9bc4-4e514e3a462c.png?resizew=184)
(1)求证:
是
中点;
(2)证明:
;
(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/db08db31046bf98eb01abfbf356059ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c235aa3c3d273fdf205b1057eea7439.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2205cffebf8c4d5f81d15ed7b85c8936.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acee03d4bb4667b6c345221b6c9b0fa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://img.xkw.com/dksih/QBM/2017/3/6/1637836815663104/1637860221419520/STEM/9f3f9bef-f847-4992-9bc4-4e514e3a462c.png?resizew=184)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da48240e7fc3248f773ac1500c15ec14.png)
(3)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b33b7213d99a817bff19bcf740a0697c.png)
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2017-03-06更新
|
883次组卷
|
5卷引用:2017届广西柳州市、钦州市高三第一次模拟考试数学(理)试卷
2014·北京石景山·一模
名校
解题方法
7 . 给定椭圆![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a5bbb709522dba9425a6b45ee671298.png)
,称圆心在原点
,半径为
的圆是椭圆
的“准圆”.若椭圆
的一个焦点为
,其短轴上的一个端点到
的距离为
.
的方程和其“准圆”方程;
(2)点
是椭圆
的“准圆”上的动点,过点
作椭圆的切线
交“准圆”于点
.
①当点
为“准圆”与
轴正半轴的交点时,求直线
的方程并证明
;
②求证:线段
的长为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a5bbb709522dba9425a6b45ee671298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48da128547c4cf9745e8e4b99988a3db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da001dad7941e6c9858637d7b62cec59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c86bc114a286413e3933352392080a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44434b647ec546fe787e2164e0be6cd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
①当点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44434b647ec546fe787e2164e0be6cd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ce08b357f11ef44c3e8207ac574422a.png)
②求证:线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
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2016-12-02更新
|
1800次组卷
|
8卷引用:2014届北京市石景山区高三一模理科数学试卷
(已下线)2014届北京市石景山区高三一模理科数学试卷(已下线)2014届甘肃省兰州一中高考模拟四理科数学试卷(已下线)2014届甘肃省兰州一中高考模拟四文科数学试卷2015-2016学年河北省石家庄一中高二下期中文科数学试卷河北省衡水中学2017届高三高考猜题卷(一)数学(理)试题山西省大同市第一中学2019-2020学年高三下学期模拟(六)数学(理)试题北京一零一中学2023届高三下学期开学考数学试题(已下线)微专题07 直线与圆锥曲线的相切问题
13-14高三上·江苏扬州·阶段练习
解题方法
8 . 如图所示,已知圆
为圆上一动点,点
是线段
的垂直平分线与直线
的交点.
![](https://img.xkw.com/dksih/QBM/2014/1/17/1571485997678592/1571486003093504/STEM/0d1c9e38dad240e08cbafd537e2365ba.png)
(1)求点
的轨迹曲线
的方程;
(2)设点
是曲线
上任意一点,写出曲线
在点
处的切线
的方程;(不要求证明)
(3)直线
过切点
与直线
垂直,点
关于直线
的对称点为
,证明:直线
恒过一定点,并求定点的坐标.
![](https://img.xkw.com/dksih/QBM/2014/1/17/1571485997678592/1571486003093504/STEM/ca55511e6f2243b4a497469654befa0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://img.xkw.com/dksih/QBM/2014/1/17/1571485997678592/1571486003093504/STEM/1419fd323f0b4f1f80b360dcd273d74c.png)
![](https://img.xkw.com/dksih/QBM/2014/1/17/1571485997678592/1571486003093504/STEM/34746eedc7114b0aaf053a5a5a507560.png)
![](https://img.xkw.com/dksih/QBM/2014/1/17/1571485997678592/1571486003093504/STEM/0d1c9e38dad240e08cbafd537e2365ba.png)
(1)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://img.xkw.com/dksih/QBM/2014/1/17/1571485997678592/1571486003093504/STEM/b3a4768d331b4176aa14ebe195163c01.png)
(2)设点
![](https://img.xkw.com/dksih/QBM/2014/1/17/1571485997678592/1571486003093504/STEM/e1da11ecc87449fcbfb4b763cffceb7a.png)
![](https://img.xkw.com/dksih/QBM/2014/1/17/1571485997678592/1571486003093504/STEM/b3a4768d331b4176aa14ebe195163c01.png)
![](https://img.xkw.com/dksih/QBM/2014/1/17/1571485997678592/1571486003093504/STEM/b3a4768d331b4176aa14ebe195163c01.png)
![](https://img.xkw.com/dksih/QBM/2014/1/17/1571485997678592/1571486003093504/STEM/e1da11ecc87449fcbfb4b763cffceb7a.png)
![](https://img.xkw.com/dksih/QBM/2014/1/17/1571485997678592/1571486003093504/STEM/323a18df83f2425d9b0cc5422498260f.png)
(3)直线
![](https://img.xkw.com/dksih/QBM/2014/1/17/1571485997678592/1571486003093504/STEM/1e0444fd4b8e45018a87449de89e66e3.png)
![](https://img.xkw.com/dksih/QBM/2014/1/17/1571485997678592/1571486003093504/STEM/e1da11ecc87449fcbfb4b763cffceb7a.png)
![](https://img.xkw.com/dksih/QBM/2014/1/17/1571485997678592/1571486003093504/STEM/323a18df83f2425d9b0cc5422498260f.png)
![](https://img.xkw.com/dksih/QBM/2014/1/17/1571485997678592/1571486003093504/STEM/62752b23b53c40ec8adf92f08132bc26.png)
![](https://img.xkw.com/dksih/QBM/2014/1/17/1571485997678592/1571486003093504/STEM/1e0444fd4b8e45018a87449de89e66e3.png)
![](https://img.xkw.com/dksih/QBM/2014/1/17/1571485997678592/1571486003093504/STEM/3587880221084256b5f9172159f22149.png)
![](https://img.xkw.com/dksih/QBM/2014/1/17/1571485997678592/1571486003093504/STEM/62fc5b061c214957b533a50bcc35ac28.png)
您最近一年使用:0次
11-12高二上·浙江金华·阶段练习
名校
9 . 若直线l:x+my+c=0与抛物线y2=2x交于A、B两点,O点是坐标原点.
(1)当m=﹣1,c=﹣2时,求证:OA⊥OB;
(2)若OA⊥OB,求证:直线l恒过定点;并求出这个定点坐标.
(3)当OA⊥OB时,试问△OAB的外接圆与抛物线的准线位置关系如何?证明你的结论.
(1)当m=﹣1,c=﹣2时,求证:OA⊥OB;
(2)若OA⊥OB,求证:直线l恒过定点;并求出这个定点坐标.
(3)当OA⊥OB时,试问△OAB的外接圆与抛物线的准线位置关系如何?证明你的结论.
您最近一年使用:0次
2016-12-01更新
|
856次组卷
|
4卷引用:2011-2012学年浙江省东阳中学高二12月阶段性检测理科数学试卷
(已下线)2011-2012学年浙江省东阳中学高二12月阶段性检测理科数学试卷(已下线)2011-2012学年山东省汶上一中高二12月月考理科数学安徽省池州市东至县第二中学2020-2021学年高二下学期3月月考文科数学试题辽宁省锦州市联合校2021-2022学年高二上学期期末模拟数学试题(锦州五高命题)
10-11高二下·四川成都·阶段练习
解题方法
10 . (文科做)如图,在长方体
中,
,
,点
在棱
上移动.
(1)证明:
;
(2)当
为
的中点时,求点
到面
的距离;
(3)
等于何值时,二面角
的大小为
.
![](https://img.xkw.com/dksih/QBM/2011/4/2/1570103484932096/1570103490330624/STEM/aeecb2e6-ec12-440e-a5aa-2fe63a557155.png?resizew=203)
(理科做)如图,在直三棱柱
中,
,
,
,
,
为侧棱
上一点,
.
(1)求证:
平面
;
(2)求二面角
的大小;
(3)求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7d64fc81c857b124268609a8beb77b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0fa81c1f81266b4ef3d471bc6bfc38d.png)
(2)当
![](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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da7977ab975efa6411cc17de39be70d9.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35988677892d6ffdf4773f7a861f26a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af9955b5aebb73cd84447e8541f901ac.png)
![](https://img.xkw.com/dksih/QBM/2011/4/2/1570103484932096/1570103490330624/STEM/aeecb2e6-ec12-440e-a5aa-2fe63a557155.png?resizew=203)
(理科做)如图,在直三棱柱
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ed8f7d3d7043d4b1eb98fc5c4e2fcd3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c279c8033acb94c3f91be2e05b0a6bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d313c04fff3842a635b334e356b07efa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6db57eca2a7cbd91bc57372592580a76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30c7c9b452fba2c98370cd2cf692aceb.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d0edb1508fc95765f3bb316bcb5252d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9afac7c616bbb14e1ed428a3c507c7dc.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41a7841fca64062a1f2112de9e696921.png)
(3)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3653ada76ba0c8afe9d57c8e7832c6ed.png)
![](https://img.xkw.com/dksih/QBM/2011/4/2/1570103484932096/1570103490330624/STEM/50b20683-ada3-41ce-9f4a-df3902a384a0.png?resizew=145)
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