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TABLX II <br />T <br />TRIGONOMETRIC FORMULAE <br />LA = GMOP, LB = LPON.= _/OPL <br />c=OP=OM=UN=1 <br />c i = a = cos B LP,.- <br />cos A = b ' = b = b -sin B <br />c 1 <br />tan A = b 4M MQ — MQ =cotNT <br />B <br />cot A ` . QN — 1T = <br />NT tan B: <br />eOQ _ OQ <br />see <br />OQ =. cac1B <br />csc A = OT OT <br />OT see B • <br />LM <br />vers A = OP — LM covers .B <br />OP'- LP <br />.covers A = op,= OP; LP = .vera B <br />ex'sec A- PQ = coexsee B <br />eoexsee A =. PT = exsec B . <br />1- Cos A 1, Cos A ' <br />2 <br />Cos 'AA <br />2 <br />sin 2P, = 2 sin A cos A cos 2A = eOS3 A - sin$ A <br />Law of Sines sin A _ sin B = cin C <br />a b c <br />Law of Cosines c2, = a2+b2— 2 ab cos G <br />Law of Tangents a+b - . tan (A+B) <br />a—b tan (A—B) <br />