Answer to Question #78435 in Complex Analysis for Manohar Das

Question #78435

Find the sum of the 5th roots of unity.

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15.07.18, 18:39

Formula exp(2*Pi*i)=1 follows from the Euleur's formula exp(ix)=cos(x)+isin(x), where i*i=-1, cos(2*Pi)=1, sin(2*Pi)=0. To find the sum of the 5th roots of unity, the formula for the sum of geometric sequence was applied, where r=exp(2*Pi*i/n) is the ratio and the sum starts from m=0 to m=n-1=5-1=4.

15.07.18, 09:17

Kindly show all the steps so that it will be easy for us.....

Answer to Question #78435 in Complex Analysis for Manohar Das

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