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[" Given "(b+c)/(11)=(c+a)/(12)=(a+b)/(13)" for a "Delta ABC" with usual notation.If "(cos A)/(alpha)=(cos B)/(beta)=(cos C)/(gamma)" ,then the "],[" ordered triplet "(alpha,beta,gamma)" has avalue ":],[[" (1) "(7,19,25)," (2) "(19,7,25)," (3) "(3,4,5)," (4) "(4)" (5,"12,13)]]

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