名校
1 . 已知:
是同一平面内的三个向量,其中![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2f242f038195884ef098a99a274a1a7.png)
(1)若
,且
,求
的坐标;
(2)若
,且
与
垂直,求
与
的夹角
.
(3)若
,且
与
的夹角为锐角,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44cbea69783ef033bf837c403cf36ccd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2f242f038195884ef098a99a274a1a7.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d5b8eb2cdf5bbb1ac234e59ea80cd1c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2ee3a0e0f06c77f9c6980d15073c693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8c308ea87b699ee1dcb879a568899de.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9d9d4998cf104d7e28f10888deb66c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96b37b1b1c2803e723337c20b554c5cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/666dd921a9619a13967d04b5710bf93b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/969604545902c9a66549a4a44ec3a3c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90ab17fd4247cdd710c363d5d3fbc5bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55b766e1414ad7445839c7ac2b9becc3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/969604545902c9a66549a4a44ec3a3c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b7447872b1ead17d89c0947b601cd87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
您最近一年使用:0次
2019-12-04更新
|
1065次组卷
|
4卷引用:上海市泥城中学2018-2019学年高二上学期第一次月考数学试题
上海市泥城中学2018-2019学年高二上学期第一次月考数学试题上海市上海交通大学附属中学2015-2016学年高二上学期期末数学试题甘肃省武威第六中学2019-2020学年高一下学期第一次学段考试(期中)数学试题(已下线)第九章 平面向量(综合测试卷)-2021-2022学年高一数学10分钟课前预习练(苏教版2019必修第二册)
2 . 设两个向量
满足
与
的夹角为
,若向量
与向量
的夹角为锐角,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42503437fb44722722cd20835f11d233.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3aaf48e9309a3dc7696eb686cdf32279.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cf39ca3294f5520518dd4f1c0609876.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a0ef0910f487aa62d02508013eb963d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bc88fd9769cede694f993e9c69df624.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
您最近一年使用:0次
名校
3 . 已知向量
=(3,-4),
=(6,-3),
=(5-m,-3-m),若∠ABC为锐角,则实数m的取值范围是__ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/911c0a2ab5e2e85f1ad267f41cb96b9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/794efd8cf0cc386faa170d01f357b1c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7195a0b5b59c9462b9faaf5a9fcfc6e0.png)
您最近一年使用:0次
2019-06-23更新
|
1100次组卷
|
5卷引用:四川省宜宾市叙州区第二中学校2019-2020学年高一下学期第四学月考试数学(文)试题
解题方法
4 . 已知
是等腰直角三角形,
,
是
边的中点,
,垂足为
,延长
交
于点
,连接
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f96d9e134e1820d80612be1bc590993e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c897a54f2e36bc4b52fba74b41c89d2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d79fa845ebcac7fbdaf52df082445799.png)
您最近一年使用:0次
2019-10-09更新
|
490次组卷
|
7卷引用:高中数学人教A版必修4 第二章 平面向量 2.5.1 平面几何中的向量方法(2)
高中数学人教A版必修4 第二章 平面向量 2.5.1 平面几何中的向量方法(2)人教A版 必杀技 第二章 平面向量 第二章全章训练人教A版 全能练习 必修4 第二章 第五节 2.5.1 平面几何中的向量方法广东省连平县忠信中学2020-2021学年高一下学期段考(一)数学试题(已下线)6.4.1 平面向量在几何和物理中的运用(精练)-2020-2021学年高一数学一隅三反系列(人教A版2019必修第二册)(已下线)专题6.9 平面向量的应用(重难点题型精讲)-2022-2023学年高一数学举一反三系列(人教A版2019必修第二册)(已下线)专题6.5 平面向量的应用-举一反三系列
名校
5 . 已知向量
.若向量
与
的夹角为锐角,则实数
的取值范围为_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1b445b85dcc07ac07577b50190e1f56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ea1f268299d57e5362182760a5961af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96b37b1b1c2803e723337c20b554c5cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
您最近一年使用:0次
2019-06-05更新
|
939次组卷
|
3卷引用:【全国百强校】安徽省六安市第一中学2018-2019学年高一下学期第二次阶段检测数学(文)试题
名校
6 . 已知椭圆![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
的短轴长等于
,离心率为
,
、
分别为椭圆
的上、下顶点.
(Ⅰ)求椭圆
的方程;
(Ⅱ)设
为直线
不同于点
的任意一点,若直线
、
分别与椭圆相交于异于
、
的点
、
,证明:
恒为钝角.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fb223b8777ab973970491bf0dcc6806.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38387ba1cadfd3dfc4dea4ca9f613cea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.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/c5db41a1f31d6baee7c69990811edb9f.png)
(Ⅰ)求椭圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(Ⅱ)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de72a5190834f5dbe895596656c038b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1156a8b29780810bd472f6d9e11b0e39.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cdba1337ec85fa9722cb4b320a82ae6.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/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/358c69b4f6c350c35d19d33c69f2a2a8.png)
您最近一年使用:0次
解题方法
7 . 已知
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62430466e50da4a5bd32783040b04bfc.png)
(1)求
;
(2)当k为何实数时,
与
的夹角为钝角?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72570757db98eae7543a123d47d829e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62430466e50da4a5bd32783040b04bfc.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97a426c9d5ee25068b1a7cc223b47382.png)
(2)当k为何实数时,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ea1f268299d57e5362182760a5961af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3364b5989fa241b26266c0d96ab9714.png)
您最近一年使用:0次
16-17高二上·上海浦东新·阶段练习
名校
8 . 已知
,
,
与
的夹角为45°,若向量
与
的夹角为锐角时,则
的取值范围为______
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9dc9e508a2f476c8ade3562f0801ff57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ace13ebf9148c275e0b1f0ac5f5b6b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/969604545902c9a66549a4a44ec3a3c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90ab17fd4247cdd710c363d5d3fbc5bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b7447872b1ead17d89c0947b601cd87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f075f5f31c260c7ac96d58c23bd8997.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
您最近一年使用:0次
2020-01-30更新
|
347次组卷
|
5卷引用:上海市华东师范大学第二附属中学2016-2017学年高二上学期第一次月考数学试题2
(已下线)上海市华东师范大学第二附属中学2016-2017学年高二上学期第一次月考数学试题2湖北省黄冈市蕲春县第一高级中学2020-2021学年高一下学期3月月考数学试题云南省大理州宾川县第四完全中学2020-2021学年高一4月月考数学试题湖北省黄冈市麻城市第二中学2020-2021学年高一下学期4月月考数学试题湖南省株洲市南方中学2020-2021学年高一下学期4月月考数学试题
9 . 如图,在平面直角坐标系中,点
,
,锐角
的终边与单位圆O交于点P.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/17/30f8986f-47ff-4d8e-86e7-cccdb6284f41.png?resizew=166)
(Ⅰ)当
时,求
的值;
(Ⅱ)在
轴上是否存在定点M,使得
恒成立?若存在,求出点M坐标;若不存在,说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b9ac996c3ee6b505a1061ad13a96177.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d26d0ade4635afddc9c7af4ece68920.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/17/30f8986f-47ff-4d8e-86e7-cccdb6284f41.png?resizew=166)
(Ⅰ)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97debbb1d8999897152876666108590d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
(Ⅱ)在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e5f4ed6e9349ed987908a84e0ced7a6.png)
您最近一年使用:0次
2019-02-06更新
|
712次组卷
|
3卷引用:湖北省襄阳五中2019-2020学年高一下学期网上学习3月月考数学试题
10 . 设
的外心
满足
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10a27dc396251a4453094d19baa79816.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e745e7394aa9d9cfa980f8766ad1661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10a27dc396251a4453094d19baa79816.png)
您最近一年使用:0次
2019-01-11更新
|
909次组卷
|
3卷引用:2019届陕西省宝鸡市高三2月模拟考试数学(理)试题