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TABLE II <br />TRIGONOMETRIC FORMULAE <br />LA = LMOP LB = LPON = LOPL <br />c=OP=OM=0N-1 <br />ainA==i=a=cosB=LP <br />cos A = = 1 = b =•ksin B = OL <br />a _ MQ MQ M = cot B <br />tan A a b OM 1 Q <br />NT_ NT NT =tan B <br />cot A = ON 1 <br />see A = OQOQOM 1 = OQ = csc B <br />OT _ OT <br />OT =sec B <br />esc A = ON 1 <br />versA = OP = LM = covers B <br />OP—LP <br />covers A = OP = OP — LP = vers B <br />exsec A = PQ — coexsec B <br />coexsec A = PT = exsec B <br />sin <br />1— Cos A cos AA = � 1+CosA <br />3/A = 2 2 <br />sin 2A = 2 sin A cos A cos 2A = cosy A — sin' A <br />sin A sin B sin C <br />' Law of Sines. —=—=— <br />a b c <br />Law of Cosines c2 = a2+b2 — 2 ab cos C <br />Law of Tangents <br />a+b _ tan M (A +B) <br />a — b tan A (A — B) <br />I' <br />