Question: x-axis time -> cycle

Hi I have one question.

I want to draw y=sin(t). x-axis is time and y-axis from 0 to 1.

I want to convert x-axis into cycle number. For example, in case of y= sin(t), one cycle is 2phi.



--------------------------------------------------------x-aixs                ->  -----------------------------------------------------x-aixs

1                    2phi                       4phi               (time)                                         1                         2           (cycle number)


It is simple function, so if I put t/2Phi instead of t, I can get a graph with cycle number. But Do you know other ways to convert that? 

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