解题方法
1 . 已知
,
与
的夹角为
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/164d6689a871b973dd7d1497a2283bb7.png)
![](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/87a78549d537a52e66b20495242afb0d.png)
您最近一年使用:0次
名校
解题方法
2 . 已知向量
,
的夹角为
,且
,
,则
( )
![](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/f1e5fa72f2878b476bc57f0df12d6555.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70e310702748855c3edccd151aae0143.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9eb4678685f70b7bb5fcf15df83942d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c67142c672f4ce0b994c1d7d444a2b47.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2020-02-21更新
|
325次组卷
|
2卷引用:新疆巴音郭楞蒙古自治州第二中学2021届高三上学期第四次月考数学(文)试题