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The location of a dot PPP at a given time ttt in the xyxyxy plane is given by (x,y)=(t−sint,1−cost)(x,y) = (t - \sin t, 1 - \cos t)(x,y)=(t−sint,1−cost). What is the distance traveled by PPP in the interval 0≤t≤2π0 \leq t \leq 2\pi0≤t≤2π?
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