解题方法
1 . (多选)已知
,
是两个单位向量,且
,则下列说法正确的是( )
![](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/aef84d275246c94cd7d9c983231210fd.png)
A.![]() |
B.对于平面内的任意向量![]() ![]() |
C.已知![]() ![]() ![]() ![]() ![]() ![]() |
D.若向量![]() ![]() ![]() |
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