QI/ Answer two only A) Determine the equation of the tangent line to the curve xsin(y) – x'cos(y) = 1 at the point (1,4) B) Find the equations of all lines having slope -1 that are tangent to the curve y (x-3) C) Find the equation of tangent to the curve 4x²+ 9y² = 36 at the point (3 cos 0, 2 sin 0). %3D

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