+0  
 
0
150
6
avatar+78 

done

 Feb 24, 2020
edited by rubikx2910  Apr 15, 2020
 #1
avatar+30595 
+5

Like so:

 

 Feb 24, 2020
 #3
avatar
0

omega doesnt have to be ei*(2pi/7) it can be ei*(4pi/7)

Guest Feb 24, 2020
 #4
avatar+30595 
0

Correct.  I just went for the simplest option!

Alan  Feb 24, 2020
 #2
avatar
0

Hi Alan

Could you tell me how you get from the last but one line to the last one, (without the use of a calculator). ?

 Feb 24, 2020
 #5
avatar+30595 
+2

I cheated and used a calculator (well, Mathcad's calculation facilities).

Alan  Feb 24, 2020
 #6
avatar+30595 
+4

Thinking about it further, I made the last few lines of the derivation of q more complicated than necessary.  Going back a few lines from the end we can do the following:

 

Alan  Feb 24, 2020

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