9. Prove the rule for finding the quotient of two complex numbers in polar form. Begin the proof as foll using the conjugate of the denominator's second factor r₁(cos0₁+i sin0₁) r2(cos02-i sin0₂) r₂(cos0₂+isin0₂) r₂(cos0₂-i sin0₂) Perform the indicated multiplications. Then use the difference formulas for sine and cosine. = r₁(cos0₁+i sin0₁) r₂(cos0₂+i sin0₂) .