名校
1 . 已知向量
,
如果
,那么
的值为_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb1b9e4620607bb9d1b4046729e40113.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6066c80fbce0c02edcdf04cd9f266cbd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a683d9cd5f84e07bc351819d9dd96df4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8716e3f2b056ab3290b1bccca78bb8f.png)
您最近一年使用:0次
名校
解题方法
2 . 已知向量
,且
,则实数![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd707b69a11f8de5566f23c1a2a9ff5a.png)
___________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69a2e64573b908633f134ea271ad1e2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1defa3bd162bb052e9abefe4d3c4eaee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd707b69a11f8de5566f23c1a2a9ff5a.png)
您最近一年使用:0次
解题方法
3 . 已知
,
,
,若
,则
与
的夹角的余弦值为_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0e2d929a578937965311b0f58294995.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e63b4ddafc2fe9b3c3d782df27094c0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/706f219cd3c920535f232a80cffdf96b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32adec8f55a5d998ec6dd6ae442c149.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f7a1df960feef63dec4790d63f52279.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d366d8fbb7258ee051f49977441e14a2.png)
您最近一年使用:0次
2016-12-13更新
|
392次组卷
|
2卷引用:甘肃省白银市会宁县第四中学2022-2023学年高一下学期第一次月考数学试题
4 . 已知向量![](https://img.xkw.com/dksih/QBM/2015/3/10/1571995274215424/1571995280048128/STEM/0ff317b9b96243b6af9c63b37ca15dfb.png?resizew=13)
,向量
,则
在
方向上的投影为_________ .
![](https://img.xkw.com/dksih/QBM/2015/3/10/1571995274215424/1571995280048128/STEM/0ff317b9b96243b6af9c63b37ca15dfb.png?resizew=13)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2266fde828fb28453b735cc8bef5111.png)
![](https://img.xkw.com/dksih/QBM/2015/3/10/1571995274215424/1571995280048128/STEM/eea26113b44b4431b7fb5bd34b9022d0.png?resizew=59)
![](https://img.xkw.com/dksih/QBM/2015/3/10/1571995274215424/1571995280048128/STEM/0ff317b9b96243b6af9c63b37ca15dfb.png?resizew=13)
![](https://img.xkw.com/dksih/QBM/2015/3/10/1571995274215424/1571995280048128/STEM/43a7608981d540579955b81d7856648d.png?resizew=13)
您最近一年使用:0次
2016-12-03更新
|
913次组卷
|
5卷引用:2015届甘肃省天水市秦安县第二中学高三第五次检测文科数学试卷1