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I need answer number 20, 35,65, 48,50,52,82 15-20 Find dy/ dx and day/ dx2. For which values of t is the curve concave upward? 20.

I need answer number 20, 35,65, 48,50,52,82

15-20 Find dy/ dx and day/ dx2. For which values of t is the curve concave upward? 20. x = cost, y = sin 2t, 0

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