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A string is wound around a circle of radius r and centre O. The point P at the end of the string is initially located

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A string is wound around a circle of radius r and centre O. The point P at the end of the string is initially located at (r, 0) . The string is then unwound while being held taut. Using the angle 0 shown in the Figure as the parametre, find parametric equations for the curve traced-out by P . y: 4

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