1.

If A + B + C = pi/3 then sin ( (pi-6A)/(6) ) + sin ( (pi = 6B)/(6) )+sin C =

Answer»

A.`- 1 + 4 COS ( (pi - 6A)/(6) ) + cos ( (pi - 6B)/(12) ) + sin C/2`
B.`4 sin ( (pi + 6A )/(12 ) ) sin ( (pi + 6B)/(12) ) cos C/2`
C.`1 - 4 cos ( (pi - 6A)/(12) ) cos ( (pi - 6B)/(12) ) cos (pi - 6C)/(12)`
D.`4 cos( (pi - 6A)/(12) ) cos ( (pi - 6B)/(12) ) sin C/2`

Answer :D


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