if cos β+cos2β+cos3β=1&sin6β=a+bsin2β=csin4β
find a+b+c
2,3,4,6 are in power..
if cos β+cos2β+cos3β=1&sin6β=a+bsin2β=csin4β
find a+b+c
2,3,4,6 are in power..
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