1 . 如图,在四棱锥
中,
平面
,
是平行四边形,
,
交于点
是
上一点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/20/3ca3bfff-fe5c-421b-a5a2-8b3e5afd92b4.png?resizew=145)
(1)求证:
;
(2)已知二面角
的余弦值为
,若
为
的中点,求
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1b49f64e0065edad868b25e9fcada3.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/b2475778cdc9ea9b6fc2d95f0194722f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d578394cd8e4d7a705599269c512960.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62e7f10e0c8af2d0d02a685f6f19e329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/20/3ca3bfff-fe5c-421b-a5a2-8b3e5afd92b4.png?resizew=145)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b757706eee506a078fc25e3f33a70cb.png)
(2)已知二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad6a0cee8226e82cc57916e10d533369.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b2a698891d42c70b597f0da4f215f09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fc56c77464a17a1e97b568762a3e2c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
您最近一年使用:0次
2 . 已知点P是圆O:x2+y2=3上的动点,过P作x轴的垂线,垂足为Q,点M满足
.
(1)求点M的轨迹C方程;
(2)若F1,F2的坐标分别为
,
,点
,过F1作直线l1⊥NF1,过F2作直线l2⊥NF2,求证:l1,l2交点在M的轨迹C上.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51cfcc6d7743b620c874df1be05d1e75.png)
(1)求点M的轨迹C方程;
(2)若F1,F2的坐标分别为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/459b4151c5b2d52986152d69e4b85455.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bbe619ab12ea3be58840a187fb67ac5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/699038188dff529f042ef91b4806da26.png)
您最近一年使用:0次
名校
解题方法
3 . 如图所示,在平行四边形ABCD中,
,
,
,点E是CD边的中点,将
沿AE折起,使点D到达点P的位置,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/22/27c77b74-f111-498c-8573-f114106a1da2.png?resizew=159)
(1)求证;平面
平面ABCE;
(2)求点E到平面PAB的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c1ac2e11788860424508ea9e80cf89d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c42ed2e5bd5a0f033e24008697bf4963.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63b43490ca09467a4c8cd8cfe91c94e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e99998f33ad6edab18180627d4903dcc.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/22/27c77b74-f111-498c-8573-f114106a1da2.png?resizew=159)
(1)求证;平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90d96357a07048ba79b8c84097d359d9.png)
(2)求点E到平面PAB的距离.
您最近一年使用:0次
2020-04-05更新
|
2282次组卷
|
4卷引用:内蒙古赤峰二中2020届普通高等学校招生第三次统一模拟考试理科数学试题
内蒙古赤峰二中2020届普通高等学校招生第三次统一模拟考试理科数学试题2019届四川省成都外国语学校高三一诊模拟考试数学(文)试题(已下线)考点27 空间向量求空间距离(讲解)-2021年高考数学复习一轮复习笔记广东省东莞市塘厦水霖学校2023-2024学年高二上学期段考一数学试题
名校
4 . 如图,在四棱锥
中,
为
的中点,
平面
,
,
.
![](https://img.xkw.com/dksih/QBM/2020/3/2/2410892134211584/2412871399514112/STEM/175741e3306045a0a56f90ce76fd7f73.png?resizew=112)
(1)求证:
平面
;
(2)求平面
与平面
所成二面角(锐角)的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f9045e6cd575bbe76c89ef6ef852fd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4c5ae16a7145a28a91d45ef950a07c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3aafd2e9983c478261f5d6cd8d5c027.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4397a199ee73fe9477d0a0170a5f8529.png)
![](https://img.xkw.com/dksih/QBM/2020/3/2/2410892134211584/2412871399514112/STEM/175741e3306045a0a56f90ce76fd7f73.png?resizew=112)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a5f445af1ae136773cb338920552ff2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca67a5b8f69507c8b80379e86f90a8ce.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88ef49a4fcf91b1c60bbd38ac51295fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
您最近一年使用:0次
5 . 在平面直角坐标系
中,抛物线方程为
,其顶点到焦点的距离为
.
(1)求抛物线的方程;
(2)若点
,设直线
与抛物线交于
、
两点,且直线
、
的斜率之和为
,试证明:对于任意非零实数
,直线
必过定点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57f8241c01fae4dee68885d7a18e79c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
(1)求抛物线的方程;
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f76841988ca278b48da8963f9a5b7d13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ac7df5a62539bbc872ddd32b9502451.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/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c95b6be4554f03bf496092f1acdfbb89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
您最近一年使用:0次
2020-03-26更新
|
540次组卷
|
3卷引用:内蒙古赤峰二中2020-2021学年高二上学期第二次月考数学(理)试题
6 . 如图,四棱锥
中,底面
为梯形,
底面
,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/26/ac2bdfff-0775-41bc-b88a-cc1716df03a9.png?resizew=220)
(1)求证:平面
平面
;
(2)设
为
上一点,满足
,若直线
与平面
所成的角为
,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/5a1b49f64e0065edad868b25e9fcada3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f79863ffcfa63117ca6741b20a48e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdb2dd10731b99c0f4f89ee957f8a239.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5679a74e9f5506266ab627894ab03243.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f144992e1cbee34868abce1e5ad38c9.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/26/ac2bdfff-0775-41bc-b88a-cc1716df03a9.png?resizew=220)
(1)求证:平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f04c222223dae9ef27d4c132534d9848.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a22fdd13e89135fd22fa9d44f335255.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f571a1aac46c6d0cf440c0ec2846bf9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b86c22b670a8e9f3896f9e8883fbbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdac04f2252fbe10562888f4578f4392.png)
您最近一年使用:0次
2020-01-30更新
|
295次组卷
|
2卷引用:重庆市渝中区巴蜀中学校2019-2020学年高二上学期期末数学试题
11-12高二下·湖北武汉·期中
名校
解题方法
7 . 已知抛物线
的焦点为F,直线l过点
.
(1)若点F到直线l的距离为
,求直线l的斜率;
(2)设A,B为抛物线上两点,且AB不与x轴垂直,若线段AB的垂直平分线恰过点M,求证:线段AB中点的横坐标为定值
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/745de5ef1fd897d16e37464172d5e8c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/363598fd39f2269952dc6ddd1201346c.png)
(1)若点F到直线l的距离为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
(2)设A,B为抛物线上两点,且AB不与x轴垂直,若线段AB的垂直平分线恰过点M,求证:线段AB中点的横坐标为定值
您最近一年使用:0次
2020-02-27更新
|
297次组卷
|
7卷引用:2011-2012学年湖北武汉部分重点中学(五校)高二下期中文科数学卷
名校
8 . 已知正方体
,E,F分别是
和CD的中点.
(1)求异面直线AE与
所成的角的大小;
(2)求证:
平面
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3da8c338342e38c9aa3f274c053fd5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6655cc150ddc9deba2254780984d0024.png)
(1)求异面直线AE与
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/557f8ff92d79a9d464ff13de17f3eae7.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f4c3f9dd5d0343597a7f58a1989b537.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb5db19f9b7553a3e76667e49c36e9a3.png)
您最近一年使用:0次
名校
9 . 在如图所示的四棱锥
中,四边形
是等腰梯形,
,
,
平面
,
,
.
(1)求证:
平面
;
(2)已知二面角
的余弦值为
,求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e5ba482836565abad208665cf7b9972.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f79863ffcfa63117ca6741b20a48e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e075468e7fb0bf30229aec01a7205977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7b5a90e556da12d63b7f481bd8e874c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89b87b3be10408261827291574434d8e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce7cad5d540488b66699a2cc72b882d8.png)
![](https://img.xkw.com/dksih/QBM/2020/4/22/2446941504200704/2447126916816896/STEM/fd016fdf3b164d6aaef98df88ba56e81.png?resizew=254)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e56fdf217165748fafe938b64fa08179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a09d9d486b7f91ba933210dd013a7f2c.png)
(2)已知二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e9d40f58f5fd5fb401a529a42b93ff1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dee14db57f0c762aad845cf5b4a243c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/138a5261a4cd0cb1f14b1dfccd4d916d.png)
您最近一年使用:0次
2020-04-22更新
|
756次组卷
|
3卷引用:2020届内蒙古呼伦贝尔市海拉尔区高三第一次统考理科数学试题
10 . 已知椭圆
的离心率为
,点
在椭圆上.
(Ⅰ)求椭圆的标准方程;
(Ⅱ)设直线
交椭圆
于
两点,线段
的中点
在直线
上,求证:线段
的中垂线恒过定点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6c9ab1e3dd0ee5768749973b5d1d856.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6edc7a191123b72fc17783272b4842.png)
(Ⅰ)求椭圆的标准方程;
(Ⅱ)设直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15b256345d7109e081b7c895591e995d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
您最近一年使用:0次