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[" 6.In a "Delta ABC,tan(A)/(2)=(5)/(6),...

[" 6.In a "Delta ABC,tan(A)/(2)=(5)/(6),tan(C)/(2)=(2)/(5)" ,then "],[[" (a) "a,c,b" are in A.P."," (b) "a,b,c" are in A.P."],[" (c) "b,a,c" are in A.P."," (d) "a,b,c" are in G.P."]]

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