名校
1 . 在如图所示的圆柱
中,
为圆
的直径,
、
是
的两个三等分点,
、
、
都是圆柱
的母线.
![](https://img.xkw.com/dksih/QBM/2022/4/24/2965187534807040/2998300579651584/STEM/53fbef0c3f8a49049af2c1e36848a21c.png?resizew=175)
(1)求证:
平面
;
(2)若
,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e65ac334119ccd6204402a7aba29a55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23f919bd3dde10dbbc076f7ec5149699.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16d65cecaf8a3dc2953f4109c75a981e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1642eec556eb252de9c1ab7bb5ca90b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/735056c174e8dd7906257a2a50a962a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4083c581c6027c4b2ae7e3b3749f485.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e65ac334119ccd6204402a7aba29a55.png)
![](https://img.xkw.com/dksih/QBM/2022/4/24/2965187534807040/2998300579651584/STEM/53fbef0c3f8a49049af2c1e36848a21c.png?resizew=175)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15d8662513d307ed16683319e997494d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a32bd7a1b78b5a0ec562c4025aea8c.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/797835e3ba47ab72406d50249adeb593.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a38a3e226347af68d7b15295342e209.png)
您最近一年使用:0次
2022-06-10更新
|
1274次组卷
|
12卷引用:新疆巴音郭楞蒙古自治州若羌县中学2022-2023学年高二下学期3月月考数学试题
新疆巴音郭楞蒙古自治州若羌县中学2022-2023学年高二下学期3月月考数学试题湖南省永州市2021届高三下学期二模数学试题(已下线)专题37 仿真模拟卷03-2021年高考数学(理)二轮复习热点题型精选精练(已下线)精做04 立体几何-备战2021年高考数学大题精做(新高考专用)(已下线)专题1.7 空间向量与立体几何-2021年高考数学解答题挑战满分专项训练(新高考地区专用)江苏省徐州市2021届高三下学期第三次调研测试数学试题西藏自治区拉萨中学2021届高三第八次月考数学(理)试题四川省成都市石室中学2021届高三三模模拟考试数学试题山东师范大学附属中学2021-2022学年高三下学期4月线上测试数学试题(已下线)2022年全国新高考II卷数学试题变式题13-16题(已下线)1.2.4 二面角(已下线)2022年全国新高考II卷数学试题变式题20-22题
名校
2 . 如图,四边形ABCD是圆柱的轴截面,
,O分别是上、下底面圆的圆心,EF是底面圆的一条直径,DE=DF.
![](https://img.xkw.com/dksih/QBM/2022/3/24/2943275657469952/2943887327248384/STEM/6733c25cd9b3432e834d1091d18c5e34.png?resizew=254)
(1)证明:EF⊥AB;
(2)若
,求平面BCF与平面CDE所成锐二面角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12fe32dfbd66709875c5b9f79c9496da.png)
![](https://img.xkw.com/dksih/QBM/2022/3/24/2943275657469952/2943887327248384/STEM/6733c25cd9b3432e834d1091d18c5e34.png?resizew=254)
(1)证明:EF⊥AB;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb37765c3d5d6b74791358200a834a67.png)
您最近一年使用:0次
2022-03-25更新
|
1021次组卷
|
5卷引用:新疆昌吉学联体2022届高三下学期第三次高考适应性联考数学(理)试题
名校
3 . 如图所示等腰梯形ABCD中,
,
,
,点E为CD的中点,沿AE将
折起,使得点D到达F位置.
(1)当
时,求证:
平面AFC;
(2)当
时,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10df84d553a8826a7ce9bff4bf0d95b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b21da760ad4567cbf991f70dca72f60d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e918b70b02a73685e3c536c7f380e2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63b43490ca09467a4c8cd8cfe91c94e4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/11/942c33e5-e90c-49e5-bb84-78b69f1aad54.png?resizew=190)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea2f0d6b7c46fd8152fc6f7bfc70ae54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/662698361c6b3ddaf0c28a3c87be53e0.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/246403a89c5e6795ef2ac6eb19928ced.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ea81cfad5da39884e84d257149d7f96.png)
您最近一年使用:0次
2022-01-25更新
|
418次组卷
|
3卷引用:新疆维吾尔自治区喀什地区喀什第六中学2023届高三上学期高考实用性(三)理科数学试题
名校
4 . 如图,在四棱锥
中,底面
是直角梯形,
,
,平面
平面
,E是
的中点,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/20/e8bec57e-7de7-4700-8617-11ff05d793a9.png?resizew=220)
(1)证明:
;
(2)求平面
与平面
夹角的余弦值.
![](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/5f79863ffcfa63117ca6741b20a48e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/080db3af81b29ed10144a1c2e2a4fb8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/342d452a7b850cd3a15b23619ad39bd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2726a625945b21b63804e07dd12c920c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae79b7d1fc4131ae3b9de76e2fa45e5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58fc6a5e71fa379d613ac1ef1cdf1048.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/20/e8bec57e-7de7-4700-8617-11ff05d793a9.png?resizew=220)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdfa54114f04a75b8c96165b3718ed7f.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64eb31601464364be2baf4aa87404bcd.png)
您最近一年使用:0次
2022-06-25更新
|
1158次组卷
|
5卷引用:新疆维吾尔自治区乌鲁木齐市第十二中学2024届高三上学期9月月考数学(理)试题
新疆维吾尔自治区乌鲁木齐市第十二中学2024届高三上学期9月月考数学(理)试题浙江省嘉兴市2021-2022学年高二下学期期末数学试题四川省内江市威远中学校2022-2023学年高三下学期第一次月考数学(理)试题江西省部分学校2022-2023学年高一下学期期末检测数学试题(已下线)第一章 空间向量与立体几何(基础、典型、新文化、压轴)分类专项训练-2022-2023学年高二数学考试满分全攻略(人教A版2019选择性必修第一册)
名校
解题方法
5 . 已知抛物线
上的点
与焦点
的距离为9,点
到
轴的距离为
.
(1)求抛物线
的方程.
(2)经过点
的直线与抛物线
交于
两点,
为直线
上任意一点,证明:直线
的斜率成等差数列.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e6c830bfa9a1b979a1a9665166424bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/647da112824baed1f2bbfff103b748e8.png)
(1)求抛物线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)经过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99c6875d552e9fff3c7d655f3a59b166.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69609f8e3507a61acc52be28597d2cc3.png)
您最近一年使用:0次
2022-05-25更新
|
2463次组卷
|
9卷引用:新疆博乐市高级中学2021-2022学年高三下学期数学联考试题(文)
名校
6 . 如图所示等腰梯形ABCD中,
,
,
,点E为CD的中点,沿AE将△DAE折起,使得点D到达F位置.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/96529d3a-60d0-44a3-88e8-48672a4363ce.png?resizew=222)
(1)当
时,求证:
平面AFC;
(2)当
时,求二面角B-EF-C的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0fff774b4b0087a6f304ce930d359be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b21da760ad4567cbf991f70dca72f60d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e918b70b02a73685e3c536c7f380e2c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/96529d3a-60d0-44a3-88e8-48672a4363ce.png?resizew=222)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea2f0d6b7c46fd8152fc6f7bfc70ae54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/662698361c6b3ddaf0c28a3c87be53e0.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/246403a89c5e6795ef2ac6eb19928ced.png)
您最近一年使用:0次
2022-03-02更新
|
256次组卷
|
2卷引用:新疆维吾尔自治区乌鲁木齐市第十二中学2024届高三下学期2月月考数学试题
名校
7 . 如图,在四棱锥
中,平面
平面
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/e17d9f5d-b9de-4052-a288-c1ec4859c9df.png?resizew=201)
(1)求证:
平面
;
(2)若直线
与底面
所成的角的正切值为
,求二面角
的正切值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78a3fd5284e160896f07ce367645fd04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5799e67a7f6ef3e0e1ec46aa0ee4c0c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7856b06682c9058d76120982fdbc91c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/28/e17d9f5d-b9de-4052-a288-c1ec4859c9df.png?resizew=201)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97f30533da2e1d2a958dc906c37eba9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f571a1aac46c6d0cf440c0ec2846bf9.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0629ce42392a7fe9be21d25c39c3e64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95bacae35b6e16a0a33c2bdc6bc07df7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/290a37874cd284fb1a8c864769ce50c9.png)
您最近一年使用:0次
2022-02-08更新
|
474次组卷
|
8卷引用:新疆维吾尔自治区伊宁市第三中学2024届高三下学期3月月考数学试题
新疆维吾尔自治区伊宁市第三中学2024届高三下学期3月月考数学试题湖北省郧阳中学,恩施高中,随州二中,襄阳三中,十堰一中2021届高三下学期4月联考数学试题(已下线)专题2.7 空间向量与立体几何-2021年高考数学解答题挑战满分专项训练(新高考地区专用)湖南省长沙市长郡中学2021-2022学年高二上学期期中数学试题安徽省亳州市第一中学2021-2022学年高二上学期11月教学检测数学试题辽宁省葫芦岛市四校2022-2023学年高二上学期期中联考数学试题福建省泉州市泉港区第一中学、厦门外国语学校石狮分校2023-2024学年高二上学期期中联考数学试题湖南省长沙外国语学校2023-2024学年高二下学期3月月考数学试题
名校
解题方法
8 . 已知等边
的边长为4,
是
边上的高,E,F分别是
和
边的中点,现将
沿
翻折成直二面角
.
![](https://img.xkw.com/dksih/QBM/2022/4/2/2949482463895552/2955229042335744/STEM/ef6ee14c-7efe-4c71-a75c-8f52b0f1e595.png?resizew=325)
(1)求直线
与平面
的夹角的正弦值;
(2)在线段
上是否存在一点
,使
?证明你的结论.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6dfb039aafe2d2841f8c28b117cf741.png)
![](https://img.xkw.com/dksih/QBM/2022/4/2/2949482463895552/2955229042335744/STEM/ef6ee14c-7efe-4c71-a75c-8f52b0f1e595.png?resizew=325)
(1)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/134ef0b1a2669a09f05bd4dc2496f706.png)
(2)在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e32cf73c01995c91c3523fa11b3bd7d.png)
您最近一年使用:0次
9 . 已知椭圆E:
的离心率为
,椭圆E的长轴长为2
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/12/e661ca75-054f-4ff9-acce-1d6299d99cba.png?resizew=252)
(1)求椭圆
的标准方程;
(2)设
,
,过
且斜率为
的动直线
与椭圆
交于
,
两点,直线
,
分别交☉C:
于异于点
的点
,
,设直线
的斜率为
,直线
,
的斜率分别为
.
①求证:
为定值;
②求证:直线
过定点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48da128547c4cf9745e8e4b99988a3db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/827ccf0c04aa941ba20d5f4c6068b46b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35361e76a7c85d1886728c8d0200b234.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/12/e661ca75-054f-4ff9-acce-1d6299d99cba.png?resizew=252)
(1)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71885f023172807ad43f2c9a670aa960.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29610a3415c1e795d35979a5a9ff69f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6defc43285a40f7ccb74c1cc04265eba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.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/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7785afeeaf274892253d04b4f693b367.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e318cefab1d71238b6a770e9d5fe154e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.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/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/423b7ae39db552e60ee8b1d27312306f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7785afeeaf274892253d04b4f693b367.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e2d18088eecb661fd38b53f6fd0b09a.png)
①求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ee950caafdafed20520afb0ce328d1.png)
②求证:直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
您最近一年使用:0次
2021-12-15更新
|
1089次组卷
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5卷引用:新疆乌鲁木齐市第八中学2021-2022学年高二上学期第二次月考数学(问卷)试题
名校
解题方法
10 . 已知抛物线
:
上的点
到其焦点的距离为2.
(1)求点P的坐标及抛物线C的方程;
(2)若点M、N在抛物线C上,且
,求证:直线MN过定点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7089148c36cb3c39af71de653756396a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/406db3053f2fc3878762d8a0dfc4c425.png)
(1)求点P的坐标及抛物线C的方程;
(2)若点M、N在抛物线C上,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56db85c6e5d2ee49ad2bed2bdef39ffa.png)
您最近一年使用:0次
2021-11-13更新
|
1209次组卷
|
5卷引用:新疆师范大学附属中学2020-2021学年高二12月月考数学(文)试题
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