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Grade: 11
        
 the  question is to find the value  of 8k=1 (cos2kpi/9 +i sin2kpi/9), here can i take cis value common and add the remaining ,if  cannot pls do explain???,  and when should i take this cis form
2 months ago

Answers : (1)

Vikas TU
8478 Points
							
Hiii Reenu 
Please clearify what are you talking about cis. 
Just expand the series by putting the value of k ,
after that you have to take real part and imaginry part common separate , 
then you should solve for real part and imaginry part separately, 
Hope this will help.
2 months ago
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