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Assertion (A): If A, B, C are the angles of a triangle such that cos A + cos B + Cos C = 0 = sin A + sin B + sin C then cos 3A + cos 3B + cos 3C = -3Reason (R) : If cos alpha + cos beta + cos gamma = 0 = sin alpha + sin beta + singamma then cos 3 alpha + cos 3 beta + cos 3 gamma = 3 cos (gamma+alpha+beta)

Answer»

Both A and R are true R is CORRECT explanation to A
Both A and R are true but R is not correct explanation to A
A is true R is false
A is false R is true

ANSWER :A


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