满分5 >
高中数学试题 >
已知α是第三象限的角,且tanα=2,则sin(α+)=( ) A. B. C....
已知α是第三象限的角,且tanα=2,则sin(α+
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102439533561947/SYS201311031024395335619005_ST/0.png)
)=( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102439533561947/SYS201311031024395335619005_ST/1.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102439533561947/SYS201311031024395335619005_ST/2.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102439533561947/SYS201311031024395335619005_ST/3.png)
D.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102439533561947/SYS201311031024395335619005_ST/4.png)
考点分析:
相关试题推荐
已知等差数列1,a,b,等比数列3,a+2,b+5,则该等差数列的公差为( )
A.3或-3
B.3或-1
C.3
D.-3
查看答案
给出以下命题:①∃x∈R,sinx+cosx>1②∀x∈R,x
2-x+1>0③“x>1”是“|x|>1”的充分不必要条件,其中正确命题的个数是( )
A.0
B.1
C.2
D.3
查看答案
i是虚数单位,复数
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102439533561947/SYS201311031024395335619002_ST/0.png)
的虚部是( )
A.0
B.-1
C.1
D.-i
查看答案
在△ABC中,a,b,c分别为三个内角A,B,C所对的边,设向量
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102439533561947/SYS201311031024395335619001_ST/0.png)
,若
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102439533561947/SYS201311031024395335619001_ST/1.png)
,则角A的大小为( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102439533561947/SYS201311031024395335619001_ST/2.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102439533561947/SYS201311031024395335619001_ST/3.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131103102439533561947/SYS201311031024395335619001_ST/4.png)
D.
查看答案
已知集合M={0,1,2},N={x|x=2a,a∈M},则集合M∩N=( )
A.{0}
B.{0,1}
C.{1,2}
D.{0,2}
查看答案