设
与
为单位向量,且
,则
与
的夹角为( )
![](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/b7cc05b3e57a8ed9e27131a55bdd28c8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2024-05-10 20:14:12
|
相似题推荐
单选题
|
容易
(0.94)
名校
【推荐1】在
中,若
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e966528b6141fd3e60b987bd947ac4b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27ba370a3912d1a983146af9c7f9c950.png)
A.3 | B.![]() | C.4 | D.![]() |
您最近一年使用:0次
单选题
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容易
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名校
解题方法
【推荐1】已知平面向量
,
满足
,
,点D满足
,E为
的外心,则
的值为( )
![](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/523667388f8e1cfefecab830767fec53.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfae5e4027c406c3eb027d5f3c05dca9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a9188c1e002665dcaf6d71c35b9fd76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2ec541074ac4739d09d9fb8470e377b.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
单选题
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(0.94)
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【推荐2】设
是两个单位向量,若
在
上的投影向量为
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b172cf8d898883d82e973f28c3c3a3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9cd8bbf47b69bbd7a6263b041290d11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2362d631b44183afb930319b9446e6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/553aa90c77403804e37a6b306b9dd2ba.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次