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dy (i) If y = (sinx + cosx)secx, then find dx %3D (ii) If y = 3x-2 - then find y. (iii) If f(x)

dy (i) If y = (sinx + cosx)secx, then find dx %3D (ii) If y = 3x-2 - then find y". (iii) If f(x) = xsinx + 2xcosx + 2sinx, then find f'(x).

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