解题方法
1 . 已知正四棱锥
中,O为底面ABCD的中心,如图所示.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/26/05dc9a6b-56ad-4274-a7b8-1b8fa142b1e1.png?resizew=162)
(1)作出过点O与平面PAD平行的截面,在答题卡上作出该截面与四棱锥表面的交线,写出简要作图过程及理由;
(2)设PD的中点为G,
,求AG与平面PAB所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/26/05dc9a6b-56ad-4274-a7b8-1b8fa142b1e1.png?resizew=162)
(1)作出过点O与平面PAD平行的截面,在答题卡上作出该截面与四棱锥表面的交线,写出简要作图过程及理由;
(2)设PD的中点为G,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/829f9180ddd9aa1a0ee0dc520f4e0b5f.png)
您最近一年使用:0次
2022-11-23更新
|
326次组卷
|
3卷引用:云南省昆明市官渡区艺卓中学2023届高三下学期第二次月考数学试题
2 . 设
,
,
,若
是
的充分不必要条件,则
的值可以是______ .(只需填写一个满足条件的
即可)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58b140e221ddf537b8964fff8557cca0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e7387721388d953fa260e5309754f43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56ac014de7066325ae57e72781a3754f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1010846eeec6c9da29640f5aa3f8738.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
2019-01-14更新
|
1485次组卷
|
7卷引用:【市级联考】云南省昆明市2019届高三1月复习诊断测试文科数学试题
【市级联考】云南省昆明市2019届高三1月复习诊断测试文科数学试题【市级联考】云南省昆明市2019届高三1月复习诊断测试理科数学试题人教A版(2019) 必修第一册(上) 重难点知识清单 第一章 集合与常用逻辑用语 1.4 充分条件与必要条件(已下线)专题05+1.4.1充分条件与必要条件(基础练)-2020-2021学年高一数学十分钟同步课堂专练(人教A版2019必修第一册)(已下线)1.2.1+充分条件与必要条件(基础练)-2020-2021学年高二数学(文)十分钟同步课堂专练(人教A版选修1-1)(已下线)1.2.1+充分条件与必要条件(基础练)-2020-2021学年高二数学(理)十分钟同步课堂专练(人教A版选修2-1)(已下线)1.4 (分层练)充分条件与必要条件-2021-2022学年高中数学必修第一册课时解读与训练(人教A版2019)
名校
解题方法
3 . 椭圆规是画椭圆的一种工具,如图1所示,在十字形滑槽上各有一个活动滑标M,N,有一根旋杆将两个滑标连成一体,
,D为旋杆上的一点且在M,N两点之间,且
,当滑标M在滑槽EF内作往复运动,滑标N在滑槽GH内随之运动时,将笔尖放置于D处可画出椭圆,记该椭圆为C.如图2所示,设EF与GH交于点O,以EF所在的直线为x轴,以GH所在的直线为y轴,建立平面直角坐标系.
(1)求椭圆C的方程;
(2)设
是椭圆C的左、右顶点,点P为直线
上的动点,直线
分别交椭圆于Q,R两点,求四边形
面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86a75ceda58dc869a4bcc0f7628a27c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a205dfd17e1ec77830fd04a1d912dc68.png)
(1)求椭圆C的方程;
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00442d96d695db2c58bf1fb7165fca94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39cc033406da2cdd342308972c6701f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ece03cb7db90b8cc4836fb63f943ee4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/291477a8e77c83c84a6b834b732f7f37.png)
您最近一年使用:0次
名校
解题方法
4 . 如图,某同学用两根木条钉成十字架,制成一个椭圆仪.木条中间挖一道槽,在另一活动木条
的P处钻一个小孔,可以容纳笔尖,A,B各在一条槽内移动,可以放松移动以保证
与
的长度不变,当A,B各在一条槽内移动时,P处笔尖就画出一个椭圆E.已知
,且P在右顶点时,B恰好在
点,则E的离心率为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/108a30042e37f9134f9f165c8415c0bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/3/6dcd181b-f70a-4a6f-8088-cd788b6c6294.png?resizew=190)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
解题方法
5 . 某同学所在的课外兴趣小组计划用纸板制作一个简易潜望镜模型(图甲),该模型由两个相同的部件拼接粘连制成,每个部件由长方形纸板
(图乙)沿虚线裁剪后卷一周形成,其中长方形
卷后为圆柱
的侧面.为准确画出裁剪曲线,建立如图所示的以
为坐标原点的平面直角坐标系,设
为裁剪曲线上的点,作
轴,垂足为
.图乙中线段
卷后形成的圆弧
(图甲),通过同学们的计算发现
与
之间满足关系式
,现在另外一个纸板上画出曲线
,如图丙所示,把沿虚线裁剪后的长方形纸板卷一周,求该裁剪曲线围成的椭圆的离心率为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/29/45257ed5-70b8-4c15-8a6c-24c2d4261e8a.png?resizew=441)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bbb96f406684e10112e653e32db1e3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d37a8d182d88a137e3b65710d2c30c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e65ac334119ccd6204402a7aba29a55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44ee82573986d4fa6a7ee1b5f397edae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59fbd9b5e5d8be69373850d7faebdaf1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c4cd68cc82e90a5e2049a7ea3171b84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5111b111c0b62990a650a817dbff416d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9856bf8499f6e26394f438c220507c44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2408900cfe417ec88c1531de004d4188.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/20/ea8cf1bd-b1ab-4ccf-9c8f-0238602164fa.png?resizew=152)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/29/45257ed5-70b8-4c15-8a6c-24c2d4261e8a.png?resizew=441)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
2023-09-19更新
|
951次组卷
|
4卷引用:云南省大理白族自治州大理市辖区2024届高三区域性规模化统一检测数学试题
云南省大理白族自治州大理市辖区2024届高三区域性规模化统一检测数学试题云南省三校2024届高三高考备考实用性联考卷(三)数学试题(已下线)第十一章 数学建模综合测试B(提升卷)(高三一轮)北京朝阳区六校联考2024届高三12月阶段性诊断数学试题
解题方法
6 . 如图,在棱长为2的正方体
,中,设E是
的中点.
![](https://img.xkw.com/dksih/QBM/2022/2/22/2921835575279616/2938936830320640/STEM/ebc0a3f638474faf8cdd579afb520cbe.png?resizew=162)
(1)过点A,C且与平面
平行的平面
与此正方体的面相交,交线围成一个三角形,在图中画出这个三角形(不必说明画法和理由);
(2)求平面
与平面
所成二面角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c3defdd4d0c665d55184b84a7eb316f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://img.xkw.com/dksih/QBM/2022/2/22/2921835575279616/2938936830320640/STEM/ebc0a3f638474faf8cdd579afb520cbe.png?resizew=162)
(1)过点A,C且与平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1c1acd7da8817385417e1dff25bfe25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f9f13dd357a98f19e9e42cf69c40558.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee8b5a6dbcf05f572f83f51abf7d668c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f9f13dd357a98f19e9e42cf69c40558.png)
您最近一年使用:0次
名校
7 . 如图,在四棱锥
中,平面
平面
,
,
,
,
,
,
,
分别为
,
的中点,
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/13/3a8d847e-3074-4285-a6e5-29b01fe29efa.png?resizew=145)
(1)求证:
,
,
,
四点在同一球面上,并说明球心及半径;
(2)画出平面
与平面
的交线(不需要写画法).
(3)设平面
与平面
的交线为
,直线
与平面
所成角的正切值为
,求平面
与平面
所成的锐二面角的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df5c044e1f89e113f1f4f63cf60c7518.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/62974d34de3a12418d6b700420afd1b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f571396be1aa4a8914a66f7d7abd6381.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4795ee1f96b430529934e2231b38885d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5729dd997ea7e8cb4cef8b7165b36e00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18120a244d3a1f9c1688bf53eb2ad775.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/13/3a8d847e-3074-4285-a6e5-29b01fe29efa.png?resizew=145)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](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/7f9e8449aad35c5d840a3395ea86df6d.png)
(2)画出平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/218054144a13435580cd132b9459546c.png)
(3)设平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/218054144a13435580cd132b9459546c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4e108d5c61e85e0741ec2c484fc5768.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43ef4b918d022644e812c610a7308019.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/218054144a13435580cd132b9459546c.png)
您最近一年使用:0次
名校
解题方法
8 . 如图长方体
中,
,
,过点
的平面
与此长方体的面相交,交线围成一个边长为5的菱形.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/2/9faeedd4-0f73-4dce-b40a-a65ae76fd492.png?resizew=108)
(1)在图中画出这个菱形(说明画法,但不必证明);
(2)若平面
与
的交点为F,求直线CF与平面
所成的角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b37750daa8ba3b3fe3e9e2092f81c848.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac5e1093a147c521c5e8d0d5e266db54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/2/9faeedd4-0f73-4dce-b40a-a65ae76fd492.png?resizew=108)
(1)在图中画出这个菱形(说明画法,但不必证明);
(2)若平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
您最近一年使用:0次
9 . 椭圆规是画椭圆的一种工具,如图1所示,在十字形滑槽上各有一个活动滑标
,
,有一根旋杆将两个滑标连成一体,
,
为旋杆上的一点,且在
,
两点之间,且
,当滑标
在滑槽
内做往复运动,滑标
在滑槽
内随之运动时,将笔尖放置于
处可画出椭圆,记该椭圆为
.如图2所示,设
与
交于点
,以
所在的直线为
轴,以
所在的直线为
轴,建立平面直角坐标系.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/28/984b7dca-155d-4a64-bdc0-4cda2a5f53c3.png?resizew=463)
(1)求椭圆
的方程;
(2)设
,
是椭圆
的左、右顶点,点
为直线
上的动点,直线
,
分别交椭圆于
,
两点,求四边形
面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4e00ad067ceaf3a8c0452e5cd52a506.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d17663aeb7b7594a6b3af7d1538bb750.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42887d9bf31c1dd99f13c39e63c9ab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42887d9bf31c1dd99f13c39e63c9ab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42887d9bf31c1dd99f13c39e63c9ab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/28/984b7dca-155d-4a64-bdc0-4cda2a5f53c3.png?resizew=463)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd3b9e816b14051f785aa5aae72b8eed.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/39cc033406da2cdd342308972c6701f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d0ff310aabd2282b539537ebed3f788.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edc48974114e23f5a801843710c7ae21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/291477a8e77c83c84a6b834b732f7f37.png)
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