1 . 设
,
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a118181a9809d092e99b27e9299bdb6.png)
(1)求证
与
不共线,并求
与
的夹角的余弦值;
(2)求
在
方向上的投影;
(3)求
和
,使
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acd815ba194492fc6ec7505a3e9030f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09da986490792746d07005ad795d5505.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a118181a9809d092e99b27e9299bdb6.png)
(1)求证
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ae98586d80f892771c90ab39eaced90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee437e6ff470c2f67b8429f57b90ae37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ae98586d80f892771c90ab39eaced90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee437e6ff470c2f67b8429f57b90ae37.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94a87c03982d3af82c243fe0cca504f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ae98586d80f892771c90ab39eaced90.png)
(3)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75b5dc876d7dcd3c971b36d26668b1e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7345f310975ddb40dca94b5135c35dad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f44cf9e2b1be0f72e5d5fb47ffbf6fe1.png)
您最近一年使用:0次
名校
解题方法
2 . 在平面直角坐标系中,向量
(3,4),向量
,(λ<0),若
=1,则向量
的坐标是_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7481aca88fa2c15f6f9162080b37f0d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e82d81230b3ecc7e9b935dd41c1b74f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc9667f6c0eac65be9c5e10f966af41f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433b94c39737727e53468df419d8314a.png)
您最近一年使用:0次
2020-03-04更新
|
376次组卷
|
3卷引用:陕西省安康中学2021-2022学年高二上学期第一次月考数学试题