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I got pi/3 for question b is that correct? And as for part c, I expanded and got 2 root 2 for the real number and negative 2 root 2 for the i number.  What do I do next?  Thank you.

 Nov 10, 2019
 #1
avatar+19895 
+1

Did you get    

a   4

b  - pi/3     ?      4 (cos(-pi/3)+ i sin (-pi/3))

 

|w| = 4  ?

 Nov 11, 2019
edited by ElectricPavlov  Nov 11, 2019
edited by ElectricPavlov  Nov 11, 2019
edited by ElectricPavlov  Nov 11, 2019
 #2
avatar+19895 
+1

To divide the complex numbers that are in 'polar form'    divide the 'r' values and subtract the angles

 

I come up with  

d.   1 (cos (pi/12) + i sin (pi/12) )

 Nov 11, 2019

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