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[" 11.Given "(b+c)/(11)=(c+a)/(12)=(a+b)...

[" 11.Given "(b+c)/(11)=(c+a)/(12)=(a+b)/(13)" for a "Delta ABC" with usual notation "11(cos A)/(d)=(cos B)/(B)=(cos C)/(gamma)" ,then the "],[[" ordered triplet "(alpha,beta,gamma)" hat "(del s)/(del" value "):," (3) "(3,4,5)," (4) "(4)(5,12,13)],[" (1) "(7)(7,25)," (2) "(2)(9,7,25)," (3) "(3,4,5)]]

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