#5 Given r(t) = (x(t), y(t)) = (4 sint, -3 cost- a) Find the tangent vector when "t=to=3π/4 (b) Find the point Po on the curve, when to =3π/2 (c) Sketch the curve r(t) in the xy-plane, the Point Po, and the tangent vector (from part (a)) applie applied at Po variablet

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