已知向量
,若
间的夹角为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4087f857bf101bf199dd1e391381a24.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63619104534f32532cd4ea6d89e83ebe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c69613bda5b1face9751a8c13ae757ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1fdb6a60bb99fc9b3b74f53d1b8f6430.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4087f857bf101bf199dd1e391381a24.png)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2016-12-05 01:35:51
|
【知识点】 向量在几何中的应用
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【推荐1】在△ABC中,AD为BC边上的中线,
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A.![]() | B.2 | C.![]() | D.3 |
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