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[" Single Correct Answer Type "],[[" 51."," If "A,B" and "C" the ve postitive values such that "A+beta+C-pi" ,then the minimum value of "],[,(cos((A-B)/(2)))/((1+B))+(cos((B-C)/(2)))/((B+C))+(cos((C-A)/(2)))/((C+A))," is "]]

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