求下列函数的周期 1,y=cos(1-x) 2.y=cosx/3 3.y=1/2sin5x 4.y=√3sin(1/2x-π/4)

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求下列函数的周期 1,y=cos(1-x) 2.y=cosx/3 3.y=1/2sin5x 4.y=√3sin(1/2x-π/4)
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求下列函数的周期 1,y=cos(1-x) 2.y=cosx/3 3.y=1/2sin5x 4.y=√3sin(1/2x-π/4)
求下列函数的周期 1,y=cos(1-x) 2.y=cosx/3 3.y=1/2sin5x 4.y=√3sin(1/2x-π/4)

求下列函数的周期 1,y=cos(1-x) 2.y=cosx/3 3.y=1/2sin5x 4.y=√3sin(1/2x-π/4)
1,y=cos(1-x)
T=2Pai/|-1|=2Pai
2.y=cosx/3
T=2Pai/(1/3)=6Pai
3.y=1/2sin5x
T=2Pai/5
4.y=√3sin(1/2x-π/4)
T=2Pai/(1/2)=4Pai