cosx+cos[2π/3+x]+cos[2π/3-x]=0
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Hey.
....in second step as we know that
cosC + cosD = 2cos(Ç+D)/2 + cos(C-D)/2.
see picture!!
Hope it helped you!!
....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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