1.

Let A and B denote the statements A: cos alpha + cos beta + cos gamma=0, B:sin alpha + sin beta + sin gamma=0, If cos(beta - gamma) + cos(gamma - alpha) + cos(alpha - beta)=-3/2, then

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A is TRUE and B is false
A is FLASE and B is true
Both A and B are true
Both A and B are false.

Answer :C


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