名校
解题方法
1 . 已知
、
是两个单位向量,它们的夹角是
,设
,则向量
与
的夹角大小是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a51625aa29680efa0e12c1584388ff1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8604f9320fb0b70858342cafc0d0f1cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e590f88cc4dbe9d3c52b86d8a6edf8d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ae98586d80f892771c90ab39eaced90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee437e6ff470c2f67b8429f57b90ae37.png)
您最近一年使用:0次
名校
2 .
为
所在平面上动点,点
满足
,
,则射线
过
的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76491d7877d61e3687ae0cce5273878c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddf6ba33629128692e0b8c23100415a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20a541b81584a032f571159ea152c85a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
A.外心 | B.内心 | C.重心 | D.垂心 |
您最近一年使用:0次
2019-09-11更新
|
4628次组卷
|
3卷引用:专题4-2向量四心及补充定理综合归类-2