名校
解题方法
1 . 在平面直角坐标系
中,已知椭圆
的焦距为2,离心率为
,椭圆的右顶点为
.
(2)过点
作直线
交椭圆于两个不同点
,
,求证:直线
,
的斜率之和为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48da128547c4cf9745e8e4b99988a3db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d5989c84e320b504511f23eeb6e7357.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcba5c93bd4035937949aafa0c354106.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84d454c82d9e52747563d47b68099249.png)
您最近一年使用:0次
2020-09-06更新
|
2293次组卷
|
12卷引用:【全国市级联考】新疆维吾尔自治区乌鲁木齐地区2018届高三5月适应性训练数学(理)试题
【全国市级联考】新疆维吾尔自治区乌鲁木齐地区2018届高三5月适应性训练数学(理)试题【全国市级联考】新疆乌鲁木齐地区2018届高三5月适应性训练数学文试题2016-2017学年江苏苏锡常镇四市高三教学情况调研(一)数学试卷【全国百强校】江西省抚州市金溪县第一中学2018-2019学年高二12月月考数学(文)试题【全国百强校】江西省南昌市第十中学2018-2019学年高二上学期第二次月考数学(文)试题宁夏石嘴山市第三中学2019-2020学年高三第四次高考适应性考试数学(理)试题2020届重庆市北碚区高三上学期第一次诊断性考试数学试题2020届江苏省南通市如东县栟茶高级中学高三上学期第三次月考数学试题人教A版(2019) 选择性必修第一册 第三章 圆锥曲线的方程 单元测试陕西省渭南市大荔县2020-2021学年高二上学期期末数学(理)试题广东省佛山市禅城区佛山第一中学2022届高三上学期10月月考数学试题河南省济源市第四中学2023-2024学年高二上学期12月考数学试卷
解题方法
2 . 如图所示,四棱柱
的侧棱与底面垂直,底面
是菱形,四棱锥
的顶点
在平面
上的投影恰为四边形
对角线的交点
,四棱锥
和四棱柱
的高相等.
![](https://img.xkw.com/dksih/QBM/2020/7/30/2516895519547392/2517208957730816/STEM/a4be1ec7662c4b08941b126c4548be9b.png?resizew=182)
(1)证明:
平面
;
(2)若
,
,求平面
与平面
所成的二面角的余弦值.
![](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/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632f2bf1cd0435041fa04b01901d1c8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632f2bf1cd0435041fa04b01901d1c8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f919bd3dde10dbbc076f7ec5149699.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://img.xkw.com/dksih/QBM/2020/7/30/2516895519547392/2517208957730816/STEM/a4be1ec7662c4b08941b126c4548be9b.png?resizew=182)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa69a2247ad4d5231aa361349b12f97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50fc25927a6862b6643bcfebefc44873.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb8fb552b9e21dbaba74d11aa747790.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b4afa61e0bcb124aec52ad0cc84fd94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3da630440d6d416f19ee22c8431c882.png)
您最近一年使用:0次
2020-07-30更新
|
340次组卷
|
3卷引用:新疆乌鲁木齐市2024届高三高考模拟测试数学试题
3 . 如图,将等腰直角三角形
沿斜边上的高
翻折,使二面角
的大小为
,翻折后
的中点为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/3/eecfe303-57bb-4202-aff7-0836bd195b57.png?resizew=285)
(Ⅰ)证明
平面
;
(Ⅱ)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd29cc627d76412c236aac6b29fa0fdf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d88591679796c52024d11c4de641bdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/3/eecfe303-57bb-4202-aff7-0836bd195b57.png?resizew=285)
(Ⅰ)证明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2ffc6952e988d04f22f0fb2f7f0ab7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ddb7c2ca1b6bee86cb24fed02e40da2.png)
(Ⅱ)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35c079889aea502b5783046f78728eb1.png)
您最近一年使用:0次
2020-06-20更新
|
411次组卷
|
2卷引用:新疆乌鲁木齐地区2020届高三年级第三次质量监测理科数学试题
解题方法
4 . 已知椭圆
:
右焦点为
,
为椭圆上异于左右顶点
,
的一点,且
面积的最大值为
.
(Ⅰ)求椭圆
的标准方程;
(Ⅱ)若直线
与直线
交于点
,线段
的中点为
,证明直线
平分
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dd54b9df3402ad91e2d34c40efe0c7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be92f0e0012a7696c78e3e00513edefd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2205cffebf8c4d5f81d15ed7b85c8936.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2d52429c8324350309f77e7209a5c35.png)
(Ⅰ)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(Ⅱ)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54b53b86bd516400d6fa7dabb3603f31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb6ede9761b5b90f8dc137708e1ee90f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2273ae1ee99cec9c1304323bc9ebf75f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2d4ab4f05dbd1a4301ed0dc4c73aa75.png)
您最近一年使用:0次
2020-06-20更新
|
541次组卷
|
4卷引用:新疆乌鲁木齐地区2020届高三年级第三次质量监测理科数学试题
5 . 如图,在四棱锥
中,底面
是正方形,
平面
,且
,点
为线段
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/30/725cef74-5146-4fd0-9650-eba152709436.png?resizew=163)
(1)求证:
平面
;
(2)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/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3b10835116b9b777a666b438c907b49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/30/725cef74-5146-4fd0-9650-eba152709436.png?resizew=163)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30067b7b236d17af8a462f96a58d11bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c66d99a6a8415ddad22bbed33b64cfb.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5102c216393e133fa25dba98cd78535.png)
您最近一年使用:0次
2019-11-21更新
|
1030次组卷
|
7卷引用:新疆维吾尔自治区乌鲁木齐市第一中学2023届高三第三次诊断性测试数学(理)试题
6 . 如图,在三棱锥P-ABC中,
,
,
平面PAB,D,E分别是AC,BC上的点,且
平面PAB.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/2/1995a7a2-5ec0-44a1-b8e0-7d86cdec1c9d.png?resizew=242)
(1)求证
平面PDE;
(2)若D为线段AC中点,求直线PC与平面PDE所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23848b4957209461233d35671773e89a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83640592853a53872d7af69c0cffc1bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e56fdf217165748fafe938b64fa08179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/063510e3c1fb6a7ccc3b8e3e3c7d660e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/2/1995a7a2-5ec0-44a1-b8e0-7d86cdec1c9d.png?resizew=242)
(1)求证
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/307807ee10071bafbe922eb18d2517d7.png)
(2)若D为线段AC中点,求直线PC与平面PDE所成角的正弦值.
您最近一年使用:0次
7 . 如图,在四棱锥
中,
平面
,
是正方形,
是
中点,点
在
上,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/16/5632ee9f-5143-492f-ba63-10f0f736f2ca.png?resizew=198)
(1)证明
平面
;
(2)若
,求平面
与平面
所成二面角的正弦值.
![](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/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.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/cf4f947e0f238c37854afa0bf6b93a8d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/16/5632ee9f-5143-492f-ba63-10f0f736f2ca.png?resizew=198)
(1)证明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a5f445af1ae136773cb338920552ff2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e6c2dad46a9052a4185a4f7b4ae8a2e.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12b37cff3ef72ff9386cebea4f2792bb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d246f9eceab371ebf47a47c2f11a4ad.png)
您最近一年使用:0次
2020-03-20更新
|
301次组卷
|
2卷引用:2020届新疆乌鲁木齐地区高三年级第一次质量监测理科数学试题
8 . 如图,在四棱锥
中,底面ABCD是边长为2的菱形,
,
,M为PD的中点,E为AM的中点,点F在线段PB上,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/3/9de64bed-b446-46bc-b731-159eb2b071a9.png?resizew=193)
Ⅰ
求证
平面ABCD;
Ⅱ
若平面
底面ABCD,且
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d02bd5cfe804460846423e77f72db10f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93e4e8e584fe063630a959e21673155e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16bb7dbd88c296dada33f7762aaf9298.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ebd38be3024e7e7649d603a2831c2e3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/3/9de64bed-b446-46bc-b731-159eb2b071a9.png?resizew=193)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d71379442f28c038d367d49422cf90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/073a88b42836fb88433679932b48ad03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11d71379442f28c038d367d49422cf90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/987517758fad59f6f695761deb2a5ebd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2203f54a88b26847f30df5b29aa4a763.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e39eadad1f7e05071e19fdd1d114b387.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6750d9f532dabdefcb48ccaaf7352f0e.png)
您最近一年使用:0次
2019-04-17更新
|
547次组卷
|
2卷引用:【市级联考】新疆乌鲁木齐2019届高三第二次质量检测文科数学试题
9 . 如图,在四棱锥
中,底面
是菱形,
平面
,且
,点
,
分别是
和
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/3/dc97f9da-be6f-420e-928c-912510447827.png?resizew=222)
(Ⅰ)求证
平面
;
(Ⅱ)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/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efdf3b093c42cd20c819e0d7ea93f3cd.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/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/3/dc97f9da-be6f-420e-928c-912510447827.png?resizew=222)
(Ⅰ)求证
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06222ee533c2484ab25321a6abbf98cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80f747eb5b2d21c9de962cbfd4ec4bb7.png)
(Ⅱ)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/864689852707154e3a9be79f657f16d4.png)
您最近一年使用:0次
2019-03-19更新
|
408次组卷
|
2卷引用:【市级联考】新疆乌鲁木齐市2019届高三第二次诊断性测试数学(理)试题
10 . 已知拋物线C:
经过点
,其焦点为F,M为抛物线上除了原点外的任一点,过M的直线l与x轴、y轴分别交于A,B两点.
Ⅰ
求抛物线C的方程以及焦点坐标;
Ⅱ
若
与
的面积相等,证明直线l与抛物线C相切.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/940349e98dc700cb6e196879c1a5ad72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43e15e83c607c1c733d34df1f52e40d4.png)
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4卷引用:【市级联考】新疆乌鲁木齐2019届高三第二次质量检测文科数学试题
【市级联考】新疆乌鲁木齐2019届高三第二次质量检测文科数学试题【市级联考】新疆乌鲁木齐地区2019届高三第二次质量监测数学(理)试题2019届新疆乌鲁木齐地区高三第二次质量监测数学(文)试题(已下线)湖南省株洲市2023届高三下学期一模数学试题变式题17-22