y=(sinx-cosx)-1是 A.最小正周期为2π的偶函数               

y=(sinxcosx)1

A最小正周期为的偶函数                          B最小正周期为的奇函数

C最小正周期为π的偶函数                            D最小正周期为π的奇函数

答案

D

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