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Assertion A: In DeltaABC, sum(cos A)/(sin B sin C)=2 Reasin(R):In DeltaABC, sin A +sinB+sin C= 4"cos"A/2"cos"B/2"cos"C/2

Answer»

A is true, R is true and R is correct explanation of A
A is true, R is true and R is not correct explanation of A
A is true, R is FALSE
A is false, R is true.

Answer :B


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