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函数f(x)=sin2x-cos2x是( ) A.最小正周期为2π的奇函数 B....
函数f(x)=sin2x-cos2x是( )
A.最小正周期为2π的奇函数
B.最小正周期为2π的偶函数
C.最小正周期为π的奇函数
D.最小正周期为π的偶函数
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