1 . 已知向量
满足
,且
,则
与
的夹角为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c69613bda5b1face9751a8c13ae757ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47f836d905839bfafd9a4131b4eb18ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47bb185c1a3fb3abe9088ed5250ad554.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/696bf63a3a726968a19b8927be5a2112.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01b5960e052f614ae45628785cb2cbf4.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2 . 已知向量
=(1,1,0),
=(﹣1,0,2)且k
+
与2
﹣
互相垂直,则k的值是
![](https://img.xkw.com/dksih/QBM/2016/3/28/1572560000770048/1572560006184960/STEM/2091ca1c9c604c2d902c75c82e4179c6.png)
![](https://img.xkw.com/dksih/QBM/2016/3/28/1572560000770048/1572560006184960/STEM/7820e57fb0414345ad7512debbe11f30.png)
![](https://img.xkw.com/dksih/QBM/2016/3/28/1572560000770048/1572560006184960/STEM/28db5c088b9b4c478b62fc31ce9d3b44.png)
![](https://img.xkw.com/dksih/QBM/2016/3/28/1572560000770048/1572560006184960/STEM/cc6ba9b8b37843649769aa4c65614d76.png)
![](https://img.xkw.com/dksih/QBM/2016/3/28/1572560000770048/1572560006184960/STEM/28db5c088b9b4c478b62fc31ce9d3b44.png)
![](https://img.xkw.com/dksih/QBM/2016/3/28/1572560000770048/1572560006184960/STEM/cc6ba9b8b37843649769aa4c65614d76.png)
A.1 | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2016-12-04更新
|
209次组卷
|
4卷引用:2015-2016学年广东省普宁一中高二下学期第二次月考理科数学试卷
名校
3 . 已知
,
,
,则
与
夹角的度数为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3fb441b1aef7942c6caebe7a58de5b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34fa8ea29001bb1f0c1e5157aff2fca5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26ba996f653018f51802b36617c0923b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
您最近一年使用:0次
2016-12-03更新
|
719次组卷
|
3卷引用:2014-2015学年广东省揭阳一中高二上学期期末考试文科数学试卷