Question: Find d 2 y/dx 2 when x and y are given by (a) x = t sin t and y = t cos t (b)

Find d2y/dx2 when x and y are given by

(a) x = t sin t and y = t cos t

(b) x = 2 cos t + cos 2t and y = 2 sin t – sin 2t

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