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Grade 12Algebra

solve for x :

x7 = 1

{ the answer is not only = 1, it probably has 6 other values }

Profile image of anthony rebello
16 Years agoGrade 12
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2 Answers

Profile image of Askiitian.Expert Rajat
16 Years ago

Hi Anthony

1 = cos2pi + isin2pi

11/7 = cos(2rpi/7) + isin(2rpi/7)

where

r = 1,2,3,4,5,6,7

This was derived using Euler's Formula

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Rajat

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Profile image of anthony rebello
16 Years ago

thnx for the reply, but i hav a doubt :

 

why cant    1=cos (0) + i sin (0)