函數(shù)y=cos2x-sin2x=cos2x
∵ω=2
∴T=2π÷2=π
故答案為：π．
函數(shù)y=cos2x-sin2x的周期是_．
函數(shù)y=cos2x-sin2x的周期是______．
數(shù)學(xué)人氣：720 ℃時(shí)間：2020-05-24 16:20:20
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