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a) Find the length of the curve given by the parametric equations ? = ? ???...

a) Find the length of the curve given by the parametric equations ? = ? ??? ? + ?? ??? ?, ? = ? ??? ? − ?? ??? ? for ? ≤ ? ≤ ? ? .

b) (20 points) Find the area of the region that lies inside the circle ? = ? ??? ? and outside the circle ? = ?.

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