Multiply, divide, and power complex numbers in polar 'trigonometric' form

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Q1. Given the complex number z=−1−√3 i

a) Plot
b) Convert to complex trigonometric polar form

Recall: a+bi=r(cos⁡〖θ+j⋅sin⁡θ)〗

Q2. Find the product of the complex numbers. Leave the answer in trigonometric form.

Q3. Find the quotient of the complex numbers. Leave the answer in trigonometric form.

Q4. Find:

Write answer in rectangular form.