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If in a /\ ABC, a=6, b=3 and c(A-B)= 4/5...

If in a `/_\ ABC, a=6, b=3 and c(A-B)= 4/5` then (A) `C=pi/4` (B) `A=sin^-1 2/sqrt(5)` (C) `ar(/_\ ABC)=9` (D) none of these

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