名校
解题方法
1 . 如图,在正四棱锥P-ABCD中,侧棱长为
,底面边长为2.点E,F分别CD,BC中点.求证:
![](https://img.xkw.com/dksih/QBM/2022/3/17/2938128750092288/2948257922457600/STEM/fbda8ed6-e843-4214-9d4e-2a2896df047a.png?resizew=190)
(1)PA⊥EF;
(2)平面PAB⊥平面PCD.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://img.xkw.com/dksih/QBM/2022/3/17/2938128750092288/2948257922457600/STEM/fbda8ed6-e843-4214-9d4e-2a2896df047a.png?resizew=190)
(1)PA⊥EF;
(2)平面PAB⊥平面PCD.
您最近一年使用:0次
2022-03-31更新
|
488次组卷
|
2卷引用:四川省凉山彝族自治州西昌市2020-2021学年高二下学期期中数学(理)试题
名校
2 . 如图,在平行六面体
中,AB=AD=2,
,
,点E是AB中点,则异面直线
与DE所成角余弦值是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8d927585a17c2e98ef7d5a9589a26ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3e5397259115cf10a944e669b4a1892.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24bb49fdc6b6bbb2449fdf8a0de769d3.png)
![](https://img.xkw.com/dksih/QBM/2022/3/17/2938128750092288/2948257922375680/STEM/93f8e9a9-234f-408f-8e75-567772d049d8.png?resizew=226)
您最近一年使用:0次
2022-03-31更新
|
1210次组卷
|
7卷引用:四川省凉山彝族自治州西昌市2020-2021学年高二下学期期中数学(理)试题
四川省凉山彝族自治州西昌市2020-2021学年高二下学期期中数学(理)试题江苏省常州市北郊高级中学、华罗庚中学2022届高三下学期5月三模数学试题福建省宁德市柘荣县第一中学2021-2022学年高二下学期期中考试数学试题(已下线)专题38:空间向量及其运算 -2023届高考数学一轮复习精讲精练(新高考专用)黑龙江省哈尔滨德强学校2022-2023学年高二(宏志班)上学期期中考试数学试题(B卷)黑龙江省哈尔滨德强学校2022-2023学年高二(清北AB班)上学期期中考试数学试题(A卷)(已下线)专题8-2 立体几何中的角和距离问题(含探索性问题)-3
名校
3 . 点P是直线l:
上一动点,点
,点Q为PF的中点,点M满足MQ⊥PF,
,过点M作圆
的切线,切点为S,当
取得最小值时,则直线MF的方程为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/639c3d2ff5ee566fcc1b69c65712a661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be92f0e0012a7696c78e3e00513edefd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e5e5685aad55ff55845c82a51985d4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80145467e06b00d85689c87f3622ab24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e317def8b9cc99ed83b16554709e27f0.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
解题方法
4 . 如图,在四棱锥P-ABCD中,PA⊥平面ABCD,底面ABCD为正方形,且PA=AD=2,E,F分别为AD,PC中点.
![](https://img.xkw.com/dksih/QBM/2021/11/16/2852515793707008/2946933788164096/STEM/ea5a7d84-e6ad-401e-810a-300e7ba3a03d.png?resizew=181)
(1)求异面直线EF和PB所成角的大小;
(2)求证:平面PCE⊥平面PBC;
(3)求二面角E-PC-D的大小.
![](https://img.xkw.com/dksih/QBM/2021/11/16/2852515793707008/2946933788164096/STEM/ea5a7d84-e6ad-401e-810a-300e7ba3a03d.png?resizew=181)
(1)求异面直线EF和PB所成角的大小;
(2)求证:平面PCE⊥平面PBC;
(3)求二面角E-PC-D的大小.
您最近一年使用:0次
名校
解题方法
5 . 已知斜率为k的直线l过抛物线
的焦点,且与抛物线C交于A,B两点,抛物线C的准线上一点
满足
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88bee8e70f1fab639be1636c7bce0477.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37ab7408ffcefcb8e5e1ad4a9c58f1b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73e1f7a310cc0f0d3de590da3f3c0a3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89509122e62ab0f9e7fef2158f30b7b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88bee8e70f1fab639be1636c7bce0477.png)
您最近一年使用:0次
2022-03-28更新
|
230次组卷
|
2卷引用:四川省成都石室中学2021-2022学年高二上学期期中考试数学(理)试题
名校
解题方法
6 . 已知椭圆C:
的右焦点F与抛物线E:
的焦点相同,曲线C的离心率为
,
为E上一点且
.
(1)求曲线C和曲线E的方程;
(2)若直线l:
交曲线C于P、Q两点,1交y轴于点R.求三角形POQ面积的最大值(其中O为坐标原点).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dd54b9df3402ad91e2d34c40efe0c7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7089148c36cb3c39af71de653756396a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/543778fc5494bc33c3fbb852a0af0e43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51d4a2a035d302744fed6f65daa4ac55.png)
(1)求曲线C和曲线E的方程;
(2)若直线l:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02ebce8b2a915356ed39f36c5bad2ebe.png)
您最近一年使用:0次
名校
7 . 已知椭圆
的左右焦点为
,
.离心率
,连接C的四个顶点所得的四边形的面积为
.
(1)求椭圆C的方程;
(2)设
,
且
,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/851a5d6ec23256f9b4a9e98aa92945fe.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/075ba8c6fb5ef7288cd3fed425c8e69e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e2031d209711b058f3d278ede3c1d33.png)
(1)求椭圆C的方程;
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5cece1a780accd0bab52e3bdbda5425.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f684ee9390f7b2768f67cfb07de2c7ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e4cf129eaa44c3838fca9a424a77b76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f4dfec890cdfdda355e19463f3be813.png)
您最近一年使用:0次
名校
8 . 如图,矩形ABCD所在平面与半圆弧
所在平面垂直,M是
上异于C、D的点,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/6/e1f7b0b8-0491-40e4-b8c4-28772d6f2b29.png?resizew=219)
(1)求证:线段AM上必存在一点P,使得
平面PBD;
(2)当M是
的三等分点(偏右)时,求BD与平面BCM所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83bb3820bab977db734f4335e4fde720.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83bb3820bab977db734f4335e4fde720.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5181b97a7e43959b8455680157c3b644.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/6/e1f7b0b8-0491-40e4-b8c4-28772d6f2b29.png?resizew=219)
(1)求证:线段AM上必存在一点P,使得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe7e197f1974d1fc58cd4fa50d3cf9b7.png)
(2)当M是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83bb3820bab977db734f4335e4fde720.png)
您最近一年使用:0次
名校
解题方法
9 . 如图,三棱柱
的侧棱与底面垂直,
,
,
,
,点D是AB的中点
![](https://img.xkw.com/dksih/QBM/2021/11/24/2858369989173248/2945120299548672/STEM/0277ace1aa8f4bd6ab8b70be68592da1.png?resizew=159)
(1)求证:
;
(2)求证:
平面
;
(3)求
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb5b12692517a39c320f99a479eb055.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ffc2817fa590affb5a760a25dc65308.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92535536bd3c2761724fd058427f95a8.png)
![](https://img.xkw.com/dksih/QBM/2021/11/24/2858369989173248/2945120299548672/STEM/0277ace1aa8f4bd6ab8b70be68592da1.png?resizew=159)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b4cdc3a083d1263634d510f172dab09.png)
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4557a368725226f2c8ea2efb7d30e478.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbc7e774e4ae40c23bf4ceed179230ca.png)
(3)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11ddc92d84d188c66b435664a7e7b5a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbc7e774e4ae40c23bf4ceed179230ca.png)
您最近一年使用:0次
名校
10 . 已知双曲线C:
的右焦点为F,过点F作圆
的切线,若两条切线互相垂直,则双曲线C的离心率为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3040b6c904477030ecf8ba20b2b18759.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef74c4299221a967507c6a179337581a.png)
A.![]() | B.![]() | C.2 | D.3 |
您最近一年使用:0次
2022-03-19更新
|
305次组卷
|
3卷引用:四川省南充高级中学2021-2022学年高三上学期第一次月考数学(文)试题