Math, asked by rajasekhar2034, 1 year ago

cosx+cos[2π/3+x]+cos[2π/3-x]=0

Answers

Answered by Shubhendu8898

20

Hey.

....in second step as we know that
cosC + cosD = 2cos(Ç+D)/2 + cos(C-D)/2.
see picture!!
Hope it helped you!!

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