名校
解题方法
1 . 如图,在四棱锥
中,点E,F分别在棱QA,QC上,且三棱锥
和
均是棱长为2的正四面体,AC交BD于点O.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/19/b462f82a-aa2d-48c8-bb8c-cc874b9aea01.png?resizew=234)
(1)求证:
平面ABCD;
(2)求平面ADQ与平面BCF所成角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55c6caa0455442437177ab9b995df37b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52753d89bf58589e2e83b19bd3d140b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b6e3f0518632294dc748ca9710d15b7.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/19/b462f82a-aa2d-48c8-bb8c-cc874b9aea01.png?resizew=234)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a7cd29789ae6d0a3fd2b6cd7401af0b.png)
(2)求平面ADQ与平面BCF所成角的余弦值.
您最近一年使用:0次
2023-04-18更新
|
1002次组卷
|
3卷引用:山西省阳泉市2023届高三三模数学试题
名校
2 . 如图,在五面体
中,面
是边长为
的正方形,三角形
是等边三角形,且
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/24/c09a2f44-c90a-4e7d-a6d0-ab4388b722fd.png?resizew=267)
(1)证明:
平面
;
(2)若平面
与平面
所成二面角的正弦值为
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9165d9bfbb0f0d19eb482c2a4c1b29b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/369eb8ad56da7dc1cdb7c43762be4bee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a32bd7a1b78b5a0ec562c4025aea8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1134c8e3440abb6cd385af2c169037fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea3f58c56ea4208b11b56a343ea1de26.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/24/c09a2f44-c90a-4e7d-a6d0-ab4388b722fd.png?resizew=267)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97f30533da2e1d2a958dc906c37eba9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9a32bd7a1b78b5a0ec562c4025aea8c.png)
(2)若平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a09d9d486b7f91ba933210dd013a7f2c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9868f77d5ab5073b6145f1c6d272122e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
您最近一年使用:0次
2022-11-21更新
|
181次组卷
|
2卷引用:山西省朔州市平鲁区李林中学2022-2023学年高二上学期第一次月考数学试题
名校
解题方法
3 . 如图,已知抛物线
的焦点为F,点
为坐标原点,一条直线过定点
与抛物线相交于A,B两点,且
.
![](https://img.xkw.com/dksih/QBM/2022/8/22/3049791771590656/3052264560631808/STEM/3bf127a0886b462188ef324cb6ff89bf.png?resizew=147)
(1)求抛物线方程;
(2)连接AF,BF并延长交抛物线于C,D两点,求证:直线CD过定点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fc58c62444bf42a25289c45425a00f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65368687df4d7e3b9304e85ec4de354c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3825ccc273ef9a672a606432d165b866.png)
![](https://img.xkw.com/dksih/QBM/2022/8/22/3049791771590656/3052264560631808/STEM/3bf127a0886b462188ef324cb6ff89bf.png?resizew=147)
(1)求抛物线方程;
(2)连接AF,BF并延长交抛物线于C,D两点,求证:直线CD过定点
您最近一年使用:0次
2022-08-25更新
|
661次组卷
|
5卷引用:山西省太原市2022届高三第一次模拟数学(文)试题
4 . 如图,
在以
为直径的圆
上,
垂直圆
所在的平面,
,
,
为
的中点,
是
上一点,且平面
平面
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/12/4f71c74c-7c14-4e10-b042-6b498a2c2cbe.png?resizew=162)
(1)求证:
;
(2)求平面
与平面
夹角的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18e5ef91fb27dd684a27ae7f1993cfba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88f670e47ad75ad9b03953b7fb606780.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d89ba4036a5d18ec4abed44d7fd8e89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c77e9c89b7275b0c1a9af5c9a72e5968.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c2bc5e50b8dfa02601c70822252854a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3547a914468b082d8d8741b974a03190.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc9c9cfa597b444b5c9dbae7a825a695.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/12/4f71c74c-7c14-4e10-b042-6b498a2c2cbe.png?resizew=162)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fe0bb7d51e559e73aa16a954fe7fa33.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34be4e71cabf458f17a6cd7f24bc70af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21665d21bbfb04410c78345de1fd15ae.png)
您最近一年使用:0次
5 . 已知椭圆
的右焦点为
,上顶点为
,点
,且
.
(1)求
的方程;
(2)过
的直线交
于
两点,证明:直线
平分
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f88443cd69c1bd4462555de2713359cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f13bf66fc845b115de4ec45b4be0e23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac536e856feb18e6675a661f8fa44470.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)过
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7789a500686c7a73770404ead6af0590.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e07505530a9ec2f9c8a23e3c9eafa313.png)
您最近一年使用:0次
名校
解题方法
6 . 已知双曲线
的离心率为
,且点
在双曲线C上.
(1)求双曲线C的方程;
(2)若点M,N在双曲线C上,且
,直线
不与y轴平行,证明:直线
的斜率
为定值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83bf4fd84818abac17a9d21237ac5ce5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39ea1f5bdd213c7c3a571b4c38850bf1.png)
(1)求双曲线C的方程;
(2)若点M,N在双曲线C上,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f59747cee312ee5140643428cae79efa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
您最近一年使用:0次
2023-02-03更新
|
1881次组卷
|
12卷引用:山西省忻州市2023届高三一模数学试题
山西省忻州市2023届高三一模数学试题广东省江门市部分学校2023届高三下学期开学联考数学试题浙江省部分学校2022-2023学年高三上学期1月联考数学试题浙江省金太阳联盟2022-2023学年高三上学期1月期末联考数学试题河南省安阳市、鹤壁市、新乡市、商丘市2022-2023学年高三下学期开学考试(理科)数学试题河南省安阳市鹤壁市新乡市商丘市2022-2023学年高三下学期开学考试(文科)数学试题湖南省长沙市宁乡市第一高级中学2022-2023学年高二上学期12月月考数学试题(已下线)模块十二 解析几何-1(已下线)专题九 平面解析几何-2浙江省浙里卷天下2023届高三一模数学试题江苏省南京市建邺高级中学2023-2024学年高二上学期10月月考数学试题(已下线)专题15 圆锥曲线综合
解题方法
7 . 如图,在三棱柱
中,
平面
,D,E分别为棱AB,
的中点,
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/5/973d0791-ff5b-4568-854a-64067adb7da4.png?resizew=128)
(1)证明:
平面
;
(2)若三棱锥
的体积为
,求二面角
的余弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d25e8fc3dda4f8b45491514b6e22a962.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56f7ba05c54b3de1f4378f7c8eb58328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0402dd5ae3db10281f9f1e11738bcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/077c956ac0eb05cf120e14f17413dfa2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee631002406bf7468e534b647fc918a2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/5/973d0791-ff5b-4568-854a-64067adb7da4.png?resizew=128)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/063510e3c1fb6a7ccc3b8e3e3c7d660e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d9a8181f7a7fe7f3fac872ce9534f15.png)
(2)若三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b7cd40c9d26ada55e07fa71a4b98be7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f83dbfddc6f98548699ed581e8c8608.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf462eaaad82d6bc3b460385fd9f0de.png)
您最近一年使用:0次
2023-02-03更新
|
1461次组卷
|
5卷引用:山西省忻州市2023届高三一模数学试题
名校
8 . 如图,在三棱锥
中,
为等腰直角三角形,
,
,平面
平面
.
![](https://img.xkw.com/dksih/QBM/2022/5/8/2975228532105216/2976436413341696/STEM/7c98d06a-14e4-4293-a5d9-fead557537fd.png?resizew=164)
(1)求证:
;
(2)求二面角
的平面角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2205cffebf8c4d5f81d15ed7b85c8936.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db8af6c5712de3e32b3b2102cfd87800.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9641d01140939c44450bf39773272af6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4aa9084b8fe0fe05c4388d1f835587b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://img.xkw.com/dksih/QBM/2022/5/8/2975228532105216/2976436413341696/STEM/7c98d06a-14e4-4293-a5d9-fead557537fd.png?resizew=164)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a15a004f7d47ed595f063e60075223a.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12a4bddf1ea3c5d37f2233a4821909e9.png)
您最近一年使用:0次
2022-05-10更新
|
350次组卷
|
3卷引用:山西省晋中市2022届高三下学期5月模拟数学(理科)试题
名校
解题方法
9 . 如图所示,在四棱锥
中,底面
为直角梯形,平面
平面
,
,
,
,
为
的中点.
![](https://img.xkw.com/dksih/QBM/2022/3/7/2931316583587840/2932502327058432/STEM/5b6d3ec2-76e6-4d7c-af7e-b090164fea99.png?resizew=180)
(1)求证:
,并且求三棱锥
的体积;
(2)求直线
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/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93edc7bb513f40a89173121c8570cd65.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b0e30c61f4433ca0d6b7c30d82632a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/678069acbf21579b42a786385b154c8b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7e628d8d153b597967cbcb6e02250b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://img.xkw.com/dksih/QBM/2022/3/7/2931316583587840/2932502327058432/STEM/5b6d3ec2-76e6-4d7c-af7e-b090164fea99.png?resizew=180)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d84733f9dc908ceb11459cc2aed580ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddfe0ccf24d760c77535a70c92dad145.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/48f3c9abbd78e9a6840ee5f30381daac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e582d73b96ba649378379c3074d506d.png)
您最近一年使用:0次
2022-03-09更新
|
296次组卷
|
2卷引用:山西省晋中市2022届高三二模数学(理)试题
名校
10 . 如图,在几何体ABCDEF中,四边形ABCD是菱形,BE⊥平面ABCD,DF∥BE,且DF=2BE=2,EF=3.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/27/e4345aac-d4b3-4101-8530-e58137d8bd5c.png?resizew=156)
(1)证明:平面ACF⊥平面BEFD;
(2)若二面角A-EF-C是直二面角,求直线AE与平面ABCD所成角的正切值.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/27/e4345aac-d4b3-4101-8530-e58137d8bd5c.png?resizew=156)
(1)证明:平面ACF⊥平面BEFD;
(2)若二面角A-EF-C是直二面角,求直线AE与平面ABCD所成角的正切值.
您最近一年使用:0次
2022-07-14更新
|
1923次组卷
|
12卷引用:2017届山西省太原市高三模拟考试(一)数学理试卷
2017届山西省太原市高三模拟考试(一)数学理试卷(已下线)山西省太原市2017届高三模拟考试(一)理数试题安徽省示范高中培优联盟2020-2021学年高一下学期春季联赛数学试题江苏省苏州大学2022届高三下学期5月高考前指导数学试题江苏省泰州中学2021-2022学年高二下学期第二次质量检测数学试题江苏省苏州市第六中学2022届高三下学期三模数学试题广西桂林市023届高三上学期阶段性联合检测数学(理)试题广西桂林市2023届高三上学期阶段性联合检测数学(文)试题福建省龙岩市上杭县第一中学2022届高三下学期5月模拟考数学试题(已下线)专题32 空间向量及其应用-4江苏省南京市第十三中学2022-2023学年高三上学期学情调研四数学试题江苏省苏州市南京航空航天大学苏州附属中学2022-2023学年高一下学期6月月考数学试卷