tan600°= .
考点分析:
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函数f (x)=
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,则集合{x|f (f(x))=0}中元素的个数有( )
A.3
B.4
C.5
D.6
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已知
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224634115886795/SYS201311012246341158867008_ST/0.png)
,则tan(2α-β)的值是( )
A.-1
B.0
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224634115886795/SYS201311012246341158867008_ST/1.png)
D.1
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在直角坐标系xOy中,
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224634115886795/SYS201311012246341158867007_ST/0.png)
分别是与x轴,y轴平行的单位向量,若直角三角形ABC中,
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224634115886795/SYS201311012246341158867007_ST/1.png)
,
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224634115886795/SYS201311012246341158867007_ST/2.png)
,则k的可能值有( )
A.1个
B.2个
C.3个
D.4个
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把函数
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224634115886795/SYS201311012246341158867006_ST/0.png)
的周期扩大为原来的2倍,再将其图象向右平移
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224634115886795/SYS201311012246341158867006_ST/1.png)
个单位长度,则所得图象的解析式为( )
A.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224634115886795/SYS201311012246341158867006_ST/2.png)
B.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224634115886795/SYS201311012246341158867006_ST/3.png)
C.
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224634115886795/SYS201311012246341158867006_ST/4.png)
D.
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在区间
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131101224634115886795/SYS201311012246341158867005_ST/0.png)
范围内,函数y=tanx与函数y=sinx的图象交点的个数为( )
A.1
B.2
C.3
D.4
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