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Here's how far I got with this problem. Not sure how to go on...

 

 May 15, 2020
 #1
avatar+111360 
+1

r = √  [ (-3)^2 + (3√3)^2 ]  =  √ [ 9 + 27]  =  √36  =   6

 

θ = arctan (3√ 3 / -3)  = arctan  (-√ 3)    =    -pi/ 3  +  pi  =   2pi/3

 

z  =  6 cis  (2pi/3)

 

 

 

cool cool cool

 May 15, 2020
 #2
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0

Thanks so much CPhill!

Guest May 16, 2020

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