Question

Please Help

What is the polar form of -9 square root 3 EndRoot + 9 i?

A. 18(cos(120°) + isin(120°))
B. 18(cos(150°) + isin(150°))
C. 324(cos(120°) + isin(120°))
D. 324(cos(150°) + isin(150°))

Answer 1

I think the answer is c or d

Answer 2

The correct answer is B) 18(cos(150)+isin(150))

Explanation:

Hope this helps!