(1) Given two complex numbers ₁ = r₁(cos 0₁ + i sin 0₁) and Z₂ = r₂(cos 0₂ + i sin 0₂), prove the following formula for the division of complex numbers. [cos(0₁-0₂) + i sin(0₁-0₂)] Z1 Z2 = r₁ 72

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