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已知f(x)=,当θ∈(,)时,f(sin2θ)-f(-sin2θ)可化简为( ...
已知f(x)=
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,当θ∈(
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,
![manfen5.com 满分网](http://img.manfen5.com/res/GZSX/web/STSource/20131024182948922402291/SYS201310241829489224022012_ST/2.png)
)时,f(sin2θ)-f(-sin2θ)可化简为( )
A.2sinθ
B.-2cosθ
C.-2sinθ
D.2cosθ
考点分析:
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