在
中,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ba798854ed4717f34127d7283d0fdd9.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ddeaf7eb133cebe01b4c703f9832a82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ba798854ed4717f34127d7283d0fdd9.png)
更新时间:2024-05-18 11:11:11
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【知识点】 用定义求向量的数量积解读
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填空题-单空题
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容易
(0.94)
名校
解题方法
【推荐1】已知平面向量
,
满足
,
,
与
的夹角为60°,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba3c6bd21d9c27a68b970f446f04d6df.png)
______ .
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29276b43a2950ed71f0f9629a35dfa74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ff265969988f1f138700129e5d7a6d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c5562bd4d1b54424330cb6329cd79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45ba716f03748c19b7ce2f99af536ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba3c6bd21d9c27a68b970f446f04d6df.png)
您最近一年使用:0次
填空题-单空题
|
容易
(0.94)
解题方法
【推荐2】两个单位向量
的夹角为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c67142c672f4ce0b994c1d7d444a2b47.png)
_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b172cf8d898883d82e973f28c3c3a3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0211da37e92f915e781691296578ba0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c67142c672f4ce0b994c1d7d444a2b47.png)
您最近一年使用:0次