Multiplying polar complex numbers ( Check my work )

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I am multiplying complex numbers, but not sure if I am doing it right. Are the answers below to the questions b) and d) correct?

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These answers came back as wrong. Can anyone see where i went wrong?? Thought they was correct.

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Your answers are correct. These problems are rather simple if you know the rule: to multiply complex numbers in polar form, multiply the magnitudes and add the angles.