名校
1 . 已知向量
与
的夹角为30°,且
,
,则
等于
![](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/70e310702748855c3edccd151aae0143.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/300904a3fab65fd647b219c3b153db1b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e225297418ba60d303578d96116f2e22.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2019-08-20更新
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1173次组卷
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3卷引用:新疆疏勒县八一中学2018-2019学年高二上学期期末数学试题