解题方法
1 . 设
,
是两个非零向量,
,
,过
的起点
和终点
,分别作
所在直线的垂线,垂足分别为
,
,得到
,则
叫做向量
在向量
上的投影向量.如下图,已知扇形
的半径为1,以
为坐标原点建立平面直角坐标系,
,
,则弧
的中点
的坐标为________ ;向量
在
上的投影向量为________ .
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/427fa45527d0ce469bfd060bf6f991f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b536ac375a0b74e9c7efbc585f987f72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c83e925aa480ab51c8e5b60de95fbd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1fe2d802f2b37e7db198c5a3c1df9a4.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/84a1a69d7460d12d4facd43e0d941190.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c01fdc7bc471af0b264a04aef0823e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae818a9f8019b33ec8a61caee7cadf6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae818a9f8019b33ec8a61caee7cadf6c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a92e6eba8dab638fd66831cd3a0b6d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/427fa45527d0ce469bfd060bf6f991f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a77343ecde1c2665df291761b6563.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72249422a8b4ff069fed7aaa9a4f9f2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8a6d9ae681adf035e8a77078ce9b955.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/becc981ba29bf017d0c3a5ab1da8b8a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/329fdf7d989f77a32ca9e0361a9cc956.png)
![](https://img.xkw.com/dksih/QBM/2022/5/24/2986258238570496/2987666299437056/STEM/adcda0c8cccb42c2b54ac2670000326a.png?resizew=181)
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2022-05-26更新
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411次组卷
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2卷引用:新疆克拉玛依市2022届高三下学期第三次模拟检测数学(文)试题