解题方法
1 . 在
中,已知
,
,
,
和
边上的两条中线
,
相交于点
,则
的余弦值为___________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d70dc2c20619a4fc12a0cfda59af5b69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1371fe98a65d8ebd840c8d98346b6d15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f50b3ae183997b707d16eb4e7f6712fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c45a8a837c11c07073da3ff751d70278.png)
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2023-07-05更新
|
314次组卷
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7卷引用:湖南省怀化市2022-2023学年高一下学期期末数学试题
湖南省怀化市2022-2023学年高一下学期期末数学试题(已下线)专题05 平面向量的应用(题型专练)-《知识解读·题型专练》(人教A版2019必修第二册)(已下线)6.4.1 平面几何中的向量方法-高频考点通关与解题策略(人教A版2019必修第二册)(已下线)6.4.1 平面几何中的向量方法-同步题型分类归纳讲与练(人教A版2019必修第二册)(已下线)6.4.1 平面几何中的向量方法——课后作业(提升版)(已下线)高一下学期期末复习填空题压轴题二十三大题型专练(1)-举一反三系列(人教A版2019必修第二册)(已下线)专题3 以平面几何图形为背景的向量综合问题【练】(高一期末压轴专项)
名校
解题方法
2 . 如图,在平面中,圆
是半径为1的圆,
,设
,
为圆上的任意2个点,则
的取值范围是_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b76e8d46fb52ed398b26245a381bb21e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c1b0cfa903a902ac954ab5dcd088499.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/26/a30d18bc-3cd6-46a4-90ef-75125a24fc7f.png?resizew=179)
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2023-04-21更新
|
783次组卷
|
3卷引用:湖南省怀化市雅礼实验学校2023-2024学年高二上学期入学考试数学试题
解题方法
3 . 如图,在四边形
中,
,
,
,
,
,
为线段
的中点,
为线段
上一动点,且
,则
的最大值与最小值的比值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1134c8e3440abb6cd385af2c169037fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f47f2b6e8510964c9df2cc058891eb07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05740f0c6071846227dc0ec177ad15e8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d783fe7f3ce673d5d21281174e7a7968.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fdbd6c25d6abab167327fb39eccee7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/30/b9dead50-d9f5-4bf6-8d1a-3eb7f1cbfbb9.png?resizew=245)
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名校
解题方法
4 . 如图,已知正方形
的边长为2,过中心
的直线
与两边
,
分别交于点
,
,若
是
的中点,则
的取值范围是___________ ;若
是平面上一点,且满足
,则
的最小值是___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.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/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4f78d33e95e9a27695947a489ae3bf1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45c7da76e6ab31a053b56a480d61d27d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6e057c31608d8a78166c09ddeb3a5a3.png)
![](https://img.xkw.com/dksih/QBM/2022/4/13/2957268014317568/2961638616186880/STEM/7fba103d2f8346099f5b33c9d3f6b692.png?resizew=166)
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2022-04-19更新
|
854次组卷
|
5卷引用:湖南省怀化市第一中学2020-2021学年高一下学期期末数学试题
5 . 若
是两个非零向量,且
则
与
的夹角的取值范围是____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8ccba3b87a8a48ac3dd5f72d00bdb1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86edd5296945d9f9165d594357d9d3c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433b94c39737727e53468df419d8314a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f1c1dd6b13d92f2cc2eef097e14c07c.png)
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2020-06-15更新
|
569次组卷
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2卷引用:湖南省怀化市2020届高三下学期6月第三次模拟考试文科数学试题
6 . 在平面斜坐标系
中,
,平面上任意一点
关于斜坐标系
的斜坐标定义为:若
,其中向量
分别为斜坐标轴
轴同方向的单位向量,则
点的坐标为
.
(1)若
点的坐标为
,则![](https://img.xkw.com/dksih/QBM/2015/9/16/1572233543933952/1572233549660160/STEM/3aa64fb9f530446d9f4f0d19dbe640b1.png?resizew=45)
_______ ;
(2)以
为圆心,2为半径的圆在斜坐标系下的方程为______________ .
![](https://img.xkw.com/dksih/QBM/2015/9/16/1572233543933952/1572233549660160/STEM/ff22f99a40764a0e8c6c998958180381.png?resizew=32)
![](https://img.xkw.com/dksih/QBM/2015/9/16/1572233543933952/1572233549660160/STEM/1fe019eaa17b44e5b2d8a97b6355cbed.png?resizew=79)
![](https://img.xkw.com/dksih/QBM/2015/9/16/1572233543933952/1572233549660160/STEM/7144734a937a424f8aca3c221d1a3c05.png?resizew=16)
![](https://img.xkw.com/dksih/QBM/2015/9/16/1572233543933952/1572233549660160/STEM/ff22f99a40764a0e8c6c998958180381.png?resizew=32)
![](https://img.xkw.com/dksih/QBM/2015/9/16/1572233543933952/1572233549660160/STEM/82155b625435420884ebe94ba3476064.png?resizew=99)
![](https://img.xkw.com/dksih/QBM/2015/9/16/1572233543933952/1572233549660160/STEM/953c2b0124594777881a29b95a9ee520.png?resizew=35)
![](https://img.xkw.com/dksih/QBM/2015/9/16/1572233543933952/1572233549660160/STEM/d79de2475baf4e9496940a3926cef6fd.png?resizew=28)
![](https://img.xkw.com/dksih/QBM/2015/9/16/1572233543933952/1572233549660160/STEM/7144734a937a424f8aca3c221d1a3c05.png?resizew=16)
![](https://img.xkw.com/dksih/QBM/2015/9/16/1572233543933952/1572233549660160/STEM/b4d220eb18f04b4ca08f7a31866859ed.png?resizew=39)
(1)若
![](https://img.xkw.com/dksih/QBM/2015/9/16/1572233543933952/1572233549660160/STEM/7144734a937a424f8aca3c221d1a3c05.png?resizew=16)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1362c0809439106817fa2572994bb8c2.png)
![](https://img.xkw.com/dksih/QBM/2015/9/16/1572233543933952/1572233549660160/STEM/3aa64fb9f530446d9f4f0d19dbe640b1.png?resizew=45)
(2)以
![](https://img.xkw.com/dksih/QBM/2015/9/16/1572233543933952/1572233549660160/STEM/b0bdfec6b62744438d65789048d64de5.png?resizew=16)
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7 . 如图,在
中,
为
的中点,
为
上任一点,且
,则
的最小值为______ .
![](https://img.xkw.com/dksih/QBM/2015/4/15/1572071931600896/1572071937286144/STEM/e85b3d53bc4c474583bbedbe6c279b4d.png?resizew=45)
![](https://img.xkw.com/dksih/QBM/2015/4/15/1572071931600896/1572071937286144/STEM/d0cae6089ddd4950ad5abf4a7ebdb746.png?resizew=17)
![](https://img.xkw.com/dksih/QBM/2015/4/15/1572071931600896/1572071937286144/STEM/4f6ebbb5124c4b49bb6a8fd797122087.png?resizew=26)
![](https://img.xkw.com/dksih/QBM/2015/4/15/1572071931600896/1572071937286144/STEM/08266d9af510407fa9708aac57e96872.png?resizew=16)
![](https://img.xkw.com/dksih/QBM/2015/4/15/1572071931600896/1572071937286144/STEM/35f9780ba90f4c74aa58d6b6a92e02ae.png?resizew=28)
![](https://img.xkw.com/dksih/QBM/2015/4/15/1572071931600896/1572071937286144/STEM/3acae15cf6ba4ef1907071e5027cf2cd.png?resizew=127)
![](https://img.xkw.com/dksih/QBM/2015/4/15/1572071931600896/1572071937286144/STEM/fe84daccfd7a485aa73144c7fe565f7e.png?resizew=47)
![](https://img.xkw.com/dksih/QBM/2015/4/15/1572071931600896/1572071937286144/STEM/36f879b3a5504f29969399fae1788c7b.png?resizew=144)
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