解题方法
1 . 已知
是坐标原点,向量
,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc4876efa91f38d11ce12fed2e1fbf2e.png)
(1)求实数
的值;
(2)求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ca526692bfec82482ab9815acec88ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc4876efa91f38d11ce12fed2e1fbf2e.png)
(1)求实数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe95f656b98b53f71a9d72bf0c9a4b9.png)
您最近一年使用:0次
2018-07-18更新
|
370次组卷
|
2卷引用:【全国市级联考】广东省珠海市2017-2018学年高一下学期期末考试数学试题
2 . 已知平面向量
,
,
,
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b591b048de0f5f25af57f93070912788.png)
,则
,
的夹角大小为__ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a28f5fa4b3eda36654fb70f50563319.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f87249431e2f4f03175404e39018a56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b591b048de0f5f25af57f93070912788.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38387ba1cadfd3dfc4dea4ca9f613cea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
您最近一年使用:0次