1 . 如图,在三棱柱
中,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/20/c7e4b942-6b27-4786-a3aa-48b116e85f84.png?resizew=157)
(1)求证:
平面
;
(2)若
,直线AB与平面
所成的角为
,求平面
与平面
的夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4759c765972e2e039b295a0d0d4fc840.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/20/c7e4b942-6b27-4786-a3aa-48b116e85f84.png?resizew=157)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ce03b310edce42191f9fa75a1c909ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc6184b191e6da43911e701121517e.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/900e00a3609e6043af1034761d4d65f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58cc6184b191e6da43911e701121517e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b86c22b670a8e9f3896f9e8883fbbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99b16cff607cdc2d69afc70dc778acbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05ab602944bedd4fe63d0575178dfdb8.png)
您最近一年使用:0次
2 . 万众瞩目的北京冬奥会于2022年2月4日正式开幕,是继2008年北京奥运会之后,国家体育场(又名鸟巢)再次承办奥运会开幕式. 在手工课上,王老师带领同学们一起制作了一个近似鸟巢的金属模型,其俯视图可近似看成是两个大小不同,扁平程度相同的椭圆,已知大椭圆的长轴长为
,短轴长为
,小椭圆的长轴长为
,则小椭圆的短轴长为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86cacebfac933f2d9894147286bdd4a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e476067ee83f0666b74ef0576567c7d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e476067ee83f0666b74ef0576567c7d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/20/9094c30c-5cfd-44a9-a731-111919432712.png?resizew=153)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
名校
解题方法
3 . 已知双曲线
的左、右焦点分别为
,
,A为C的右顶点,以
为直径的圆与C的一条渐近线交于P,Q两点,且
,则双曲线C的离心率为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83bf4fd84818abac17a9d21237ac5ce5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/643ef7d761de0e794fc39937dc72ac6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7dfb5811e82360684bd82085724ece3.png)
A.![]() | B.![]() | C.![]() | D.3 |
您最近一年使用:0次
2024-02-12更新
|
886次组卷
|
6卷引用:山西省运城市2024届高三上学期期末调研测试数学试题
山西省运城市2024届高三上学期期末调研测试数学试题(已下线)专题07 双曲线与抛物线(分层练)(五大题型+12道精选真题)(已下线)专题08 圆锥曲线 第一讲 圆锥曲线的方程与性质(解密讲义)四川省成都市第七中学2024届高三下学期4月分推考试数学(理科)试卷四川省成都市石室阳安学校2023-2024学年高三下学期4月月考数学(理)试题河南省信阳市新县高级中学2024届高三下学期模拟考试一数学试题
名校
4 . 如图,空间四边形OABC中,
,点M在线段OA上,且
,点N为BC中点,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddc5343d0ed7b449971c7ba787a621fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebe72d1b634f1e89d8699e605e7d46af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8926ddd0b69d714c7310cc5bf23d199d.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
2024-02-05更新
|
233次组卷
|
3卷引用:山西省运城市2023-2024学年高二上学期期末调研测试数学试题
解题方法
5 . 如图,棱长为2的正方体
中,E,F分别为棱
的中点,G为线段
上的动点,则( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/21/40506d94-4f2f-4dcc-8667-55f3b3ef4910.png?resizew=166)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afaa4776f2c9598c44f4b6b874afe1e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7f6f93171329d508d491143b9d71f7b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/21/40506d94-4f2f-4dcc-8667-55f3b3ef4910.png?resizew=166)
A.三棱锥![]() |
B.存在点G,使得![]() |
C.G为![]() ![]() |
D.点F到直线EG距离的最小值为![]() |
您最近一年使用:0次
6 . 已知平面直角坐标系中,动点
到
的距离比
到
轴的距离大2,则
的轨迹方程是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eed54d1cbc27a97aa4ea81f355b773bf.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/ac047e91852b91af639feec23a9598b2.png)
您最近一年使用:0次
2024-01-17更新
|
695次组卷
|
4卷引用:山西运城盐湖区第五高级中学2024届高三上学期期末数学试题
山西运城盐湖区第五高级中学2024届高三上学期期末数学试题北京市房山区2024届高三上学期期末数学试题(已下线)2024年高考数学二轮复习测试卷(北京专用)(已下线)2.5 曲线与方程(五大题型)(分层练习)-2023-2024学年高二数学同步精品课堂(沪教版2020选择性必修第一册)
7 . 已知椭圆
的离心率为
,直线
过E的上顶点和右焦点,直线
过E的右顶点,
,
与
之间的距离为
.
(1)求椭圆E的标准方程.
(2)已知过原点的直线与椭圆E交于A,B两点,点C是E上异于A,B的点,且
,试问在x轴上是否存在点M,使得点M到直线AC的距离为定值?若存在,求出定值与点M的坐标;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7e5578ca83f5bd5c285994061b9c015.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d5989c84e320b504511f23eeb6e7357.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1095c036b49c3327baaa2c3c7f746134.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e9b0f5f44abbc6544a2f672b025b013.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f6f17bc385bafb37e8f964e5eb99cd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a95c6372ea779d23524d4b2173dc5aa3.png)
(1)求椭圆E的标准方程.
(2)已知过原点的直线与椭圆E交于A,B两点,点C是E上异于A,B的点,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4540450e06cdcb8e4405c2c154853f8.png)
您最近一年使用:0次
2024-01-22更新
|
736次组卷
|
5卷引用:山西运城盐湖区第五高级中学2024届高三上学期期末数学试题
名校
解题方法
8 . 如图,直三棱柱
中,
为等腰直角三角形,
,E,F分别是棱
上的点,平面
平面
,M是
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/19/130f51e7-22c1-4148-886e-06e411f590ef.png?resizew=136)
(1)证明:
平面
;
(2)若
,求平面
与平面
所成锐二面角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d89ba4036a5d18ec4abed44d7fd8e89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8e86e3991200297ad172455e5ea93f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e51838e395dfc9d9ef597d9e01f46272.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3e0dba5705e1d749cfb21ebbb2ed93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/19/130f51e7-22c1-4148-886e-06e411f590ef.png?resizew=136)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e0684e0b09b04661c602437982c0397.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87c0bfeadcf17b2a45896071f07a4a5a.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d557872d3299577be8c5872ba1ae5b59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87c0bfeadcf17b2a45896071f07a4a5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
您最近一年使用:0次
2023-12-20更新
|
643次组卷
|
4卷引用:山西运城盐湖区第五高级中学2024届高三上学期期末数学试题
名校
解题方法
9 . 如图,在四棱锥
中,
,
,
,
,
平面
,则异面直线
与
之间的距离为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0ac36c7ac328d903073739b8dcc0531.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/066cd386723885c535ea720f5817847a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c182a9d9fd0a7023b710cd671d9468e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4b3b7d5a5f5b0e64f62c49bfc726673.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75929268210da5976bc37d080da030dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db807b09cc550f476b3f8fa0c6a14425.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1d70676406f26d339465fe3473c0c05.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/22/1c756f96-b344-4c40-895a-313071483555.png?resizew=165)
您最近一年使用:0次
2023-11-02更新
|
310次组卷
|
2卷引用:山西运城盐湖区第五高级中学2024届高三上学期期末数学试题
10 . 如图,在圆柱体
中,
,
,劣弧
的长为
,AB为圆O的直径.
(1)在弧
上是否存在点C(C,
在平面
同侧),使
,若存在,确定其位置,若不存在,说明理由;
(2)求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/192f4f9446c954a291f779d963f90257.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52705567101a48893de582656ef41527.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e90a7898ed4e02bcdec4457b6d4ff5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/037fb348109dc2063a268b10eb925a57.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/5/17e89554-8bd0-4d15-95fa-a71350a8d9a1.png?resizew=167)
(1)在弧
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c01fdc7bc471af0b264a04aef0823e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d39a49fa46a594b3634381b17323c8d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7768503b1ad4775258b2f1a71c413086.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e4b18e27dd9296b846151a4eab1972a.png)
您最近一年使用:0次
2023-09-04更新
|
226次组卷
|
2卷引用:山西省运城市2024届高三上学期期末调研测试数学试题