已知向量
与
的夹角为
,且
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433b94c39737727e53468df419d8314a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95ca5f43aab946afb5a4924094df1adf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04e8382c1ce605c712a1d080fd4e1684.png)
A.![]() | B.1 | C.2 | D.4 |
更新时间:2022-05-21 21:53:09
|
相似题推荐
单选题
|
较易
(0.85)
解题方法
【推荐1】设向量
与单位向量
满足,对任意
都有
,则
的最小值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c5562bd4d1b54424330cb6329cd79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c984376f5475184e0d3e4f7e1bb65f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c51159984b2cb00f30b3986315019623.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62a3c67538851a45145854d816e2e1fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd6a58c3bf9de010cb8ff7670afbeb40.png)
A.![]() | B.2 | C.3 | D.4 |
您最近一年使用:0次
单选题
|
较易
(0.85)
名校
解题方法
【推荐2】已知
,
,且
,
的夹角为
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e366ba65e0bbae2b3b88525bb6e4471.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32834156ccf914b01f3073ff087689d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4f605ec0729ce6d72237ad662a06862.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fc9656d8286c4d6fa309d6ae347c89e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/290710d643ab6cd3b9edd73815b1d8ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c95c6fedd33a4a8b2d25c4a2bd8d077.png)
A.1 | B.![]() | C.2 | D.![]() |
您最近一年使用:0次