The distance between two moving objects whose positions are given by ( x₁, y₁ ) and ( x₂, y₂ ) is given by D=√(x₂-x)² + ( Y₂ − ₁)² If x₁ =4cost, y₁=2 sint, x₂ =2 sin 2t and y₂ =3 cos 2t find dD dt when t = π

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