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A: In a Delta ABC, if the sides a,b,c are in A.P. then a cos^2""C/2+c cos^2""A/2=3b R: In a Delta ABC, if A,B,C are in A.P. then B=pi//3

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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

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