2014·广东惠州·一模
1 . 已知向量
与
的夹角为
,定义
为
与
的“向量积”,且
是一个向量,它的长度
,若
,
,则
( )
![](https://img.xkw.com/dksih/QBM/2014/7/30/1571828907761664/1571828913315840/STEM/d53d358d466b495f9ab5a1f979a90f53.png?resizew=13)
![](https://img.xkw.com/dksih/QBM/2014/7/30/1571828907761664/1571828913315840/STEM/51656c0a08d648ed97c4146869cf4c1c.png?resizew=13)
![](https://img.xkw.com/dksih/QBM/2014/7/30/1571828907761664/1571828913315840/STEM/0df47327d5d04865961e2ca1ea96df5e.png?resizew=13)
![](https://img.xkw.com/dksih/QBM/2014/7/30/1571828907761664/1571828913315840/STEM/f851bde2046f410d916cc525a8bc2dbf.png?resizew=35)
![](https://img.xkw.com/dksih/QBM/2014/7/30/1571828907761664/1571828913315840/STEM/d53d358d466b495f9ab5a1f979a90f53.png?resizew=13)
![](https://img.xkw.com/dksih/QBM/2014/7/30/1571828907761664/1571828913315840/STEM/51656c0a08d648ed97c4146869cf4c1c.png?resizew=13)
![](https://img.xkw.com/dksih/QBM/2014/7/30/1571828907761664/1571828913315840/STEM/f851bde2046f410d916cc525a8bc2dbf.png?resizew=35)
![](https://img.xkw.com/dksih/QBM/2014/7/30/1571828907761664/1571828913315840/STEM/5df8d6aebfaf473e9d1d30d4669904b1.png?resizew=111)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75139d6505709357592504e010ea0405.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/57a7d967c17cd4bd4f507676c9d9f5e2.png)
![](https://img.xkw.com/dksih/QBM/2014/7/30/1571828907761664/1571828913315840/STEM/bd7c5ab2694448a7ad7d47eef8cadc0f.png?resizew=85)
A.![]() | B.![]() | C.6 | D.![]() |
您最近一年使用:0次
13-14高三上·江西赣州·期中
2 . 已知函数f(x)=sin
(x∈R),下面结论错误的是( )
![](https://img.xkw.com/dksih/QBM/2018/12/13/2095912224276480/2100948706828288/STEM/e7dcc4a4ff37434eac55eb73c85e6ad5.png?resizew=60)
A.函数f(x)的最小正周期为π |
B.函数f(x)是偶函数 |
C.函数f(x)的图象关于直线x=![]() |
D.函数f(x)在区间![]() |
您最近一年使用:0次
2013-11-28更新
|
1031次组卷
|
6卷引用:2015-2016学年广东省惠州一中高二4月月考文科数学试卷
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