1 . (1)对于平面向量
,
,求证:
,并说明等号成立的条件;
(2)我们知道求
的最大值可化为求
的最大值,也可以利用向量的知识,将
构造为两个向量的数量积形式,即:令
,
,则转化为
,求出最大值.利用以上向量的知识,完成下列问题:
①对于任意的
,求证:
;
②求
的最值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ff409cd3886c767afb13c9a869c5f23.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6570cd7c2f81c9fcffd2c64664f1564.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73b1d21f757e06a46d40f9b8c4f525aa.png)
(2)我们知道求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/144e44ad8402f5ee368f64a87ab8c4e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9e0b006e08261158ac9b1cd631da051.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd288d4152caf5fc8187a1a901c8949f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/070a34585f3a61222c25cebdd532184f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d68ce4ff798e7cdcc8f4256c2fd6570.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bb9fa34fafe6cd3a7db5c79cda3e0c3.png)
①对于任意的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32ac12138178cb539a9e1c8f77587038.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/920a38dd1573498365963519c3bd2daa.png)
②求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61c5e59b2552eb5f033aea9e034e87ba.png)
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解题方法
2 . 解方程
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc7bd6300b11e1c180211e365845f6c0.png)
您最近一年使用:0次
2021-03-25更新
|
96次组卷
|
2卷引用:沪教版(2020) 必修第二册 领航者 延伸阅读
3 . 求函数
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04b0098edc95e29ceda63a06223d5a7c.png)
您最近一年使用:0次
2021-03-25更新
|
148次组卷
|
2卷引用:沪教版(2020) 必修第二册 领航者 延伸阅读
4 . 在锐角
中,已知
,求角
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/217703cf348a157c1ab3ceab01d064df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
您最近一年使用:0次
2021-03-25更新
|
88次组卷
|
2卷引用:沪教版(2020) 必修第二册 领航者 延伸阅读
名校
5 . 已知
,
,向量
与向量
的夹角为
,设向量
,向量
.
(1)求
的值;
(2)设
,求
的表达式;若
与
的夹角
为锐角,求实数
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8ae0d7b3266f32b6a916b6237b6b838.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf342e77c56e55a35bb1151bc215a3a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d88591679796c52024d11c4de641bdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86fd37fdeb25c99a601be8418465021b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66b3b75ddeff746c22973e8b84fb6ff2.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c39d1d88189726ae99c309644fca3494.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e2938a15202f5a9863cb3d56469409d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2709ca478fb15ea08e8aa55328eae8e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/560ee2894ba8c5cee6633430cc8b3b41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1b8a88a16125366536cb4ad658e0cf1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
您最近一年使用:0次
2020-12-04更新
|
1545次组卷
|
7卷引用:上海市控江中学2020-2021学年高二上学期期中数学试题
上海市控江中学2020-2021学年高二上学期期中数学试题(已下线)第13讲向量的应用(练习)-【教育机构专用】2021年春季高一数学辅导讲义(沪教版2020必修第二册)(已下线)高一期末押题03-2020-2021学年高一数学下学期期末专项复习(沪教版2020)(已下线)专题10+平面向量的数量积(重点练)-2020-2021学年高一数学十分钟同步课堂专练(人教A版必修4)(已下线)2.4.1 平面向量数量积的物理背景及其含义-2020-2021学年高一数学课时同步练(人教A版必修4)河南省濮阳市第一高级中学2021-2022学年高三上学期第三次质量检测数学(理)试题四川省南充市白塔中学2021-2022学年高一下学期3月月考数学试题
名校
6 . 已知
,
是
的中点.
(1)若
,求向量
与向量
的夹角的余弦值;
(2)若
是线段
上任意一点,且
,求
的最小值;
(3)若点
是
内一点,且
,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e46a4e894ae759de1877c4d24cd135fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87909c6df58fe648cd8daa2f662a260b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18acebeae8cc30bd05d6dfd5f0f2e737.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e88bca29b1406f27f1913b7f25fb483.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ff6beb20606e85d6ff7f155907da9aa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/721ed4ebca1b4223d382b6dc71ce0971.png)
(3)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a528f40cca3187bafc597fe2228d681.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8448f2cc52d0f48e3dcb5d44c4cead1e.png)
您最近一年使用:0次
2020-06-16更新
|
256次组卷
|
3卷引用:上海市华东师范大学第二附属中学2023-2024学年高一下学期5月质量检测数学试卷
名校
7 . 已知
,且向量
、
不平行,且
.
(1)若
,且
,求向量
在
方向上的投影;
(2)若
,且向量
与
夹角为钝角,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2436ceefe6943b41626fa5ac12aac45.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/86a89a5eb11129579a45e1e550c73c9b.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ef66274206ee34d8732c08a729cdabb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7e3085830ecf4364b4a897f6e848fee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/969604545902c9a66549a4a44ec3a3c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90ab17fd4247cdd710c363d5d3fbc5bd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bba648b28ce3a5048531784efdb8195f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8c308ea87b699ee1dcb879a568899de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/358d896d9eab84c6695ddc25196e6857.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
您最近一年使用:0次
名校
8 . 已知向量
和
的夹角为60°,且
,
.
(1)求向量
在
方向上的投影;
(2)若
,求实数k的取值范围.
![](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/8b3c6023f3ebdd4dca0c57b323531e13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/861e49ff83900da40ec23f4dda9eab11.png)
(1)求向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90ab17fd4247cdd710c363d5d3fbc5bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/969604545902c9a66549a4a44ec3a3c6.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d258ac8d5b19539a90f9d445ea4980e.png)
您最近一年使用:0次
2020-01-16更新
|
181次组卷
|
2卷引用:上海市七宝中学2017-2018学年高二上学期10月月考数学试题
名校
9 . 已知圆
,
是
轴上的动点,
、
分别切圆
于
、
两点;
(1)若
,求直线
、
的方程;
(2)设
,用
表示
的余弦值,并求
的最小值;
(3)若
,试求直线
的方程;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3935dafafc5f643540f7dc493073af85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bf25e032b5599ac49383de06e776365.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf702adb116c1e46569eb7050d029f49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdebfa07f9b53d79d119cd3a1048e78a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0bf25e032b5599ac49383de06e776365.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf702adb116c1e46569eb7050d029f49.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe620edd929ceaa86a77ba94ccc8f166.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c7bbe0ac1c88c9d35978a7184ba553.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68d40f399c3737563ed161f2b7326a8a.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8639d274ec7416566696dd81f7beaebe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2dca049735b45fb9b2533c68605eddc.png)
您最近一年使用:0次
名校
10 . 已知点A(0,2),B(4,4),
;
(1)若点M在第二或第三象限,且
,求
取值范围;
(2)若
,
,
,求
在
方向上投影的取值范围;
(3)若
,求当
,且△ABM的面积为12时,a和
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e33b8cdc93f58e732a696d6a00c7c98.png)
(1)若点M在第二或第三象限,且
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4af733c6432ce382a8a3fc19ef315ac9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cd84a8f95166367063218ee03ffd5a7.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0ebe9fb63d92a6a7aabdf7d30aaaed2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d55e8e56e097afe871c2fb3eb8b2a9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e36c9c91220b0f2cbd4a48e8fa90e3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18b0966c0bed9f88656df0b50900d57f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47b8c8af42c8753c545999e6bb0db7db.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e37a63ee29fda9396419f2eb9a6a6c2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0774dfdef8338bd6871df5a89f8939a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5cd84a8f95166367063218ee03ffd5a7.png)
您最近一年使用:0次