ΔABC ∼ ΔPQR and ar(ΔABC) = 4 ar(ΔPQR). If BC = 8 cm, find QR. (a) 9 cm (b) 6 cm c) 12 cm d) 4 If tan A =5/12 then the value of cos C is a) b) c) 1 d) none of these
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