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Y .379.o09 <br /> 1v6/ <br /> TRIGONOMETRIC FORMULAE <br /> B B. B <br /> . , a <br /> e OWigaa a8la Teiaa s <br /> $elution -of Right Triasigles <br /> / �' t,"' ,`" - '• '..' r fir, /'✓ For Ailip., -sia =C, —.tea m —,,COt.s . 'i{7p ' o <br /> b a O. <br /> - �+ 1s0a1red = a 3 _V <br /> a F: <br /> O 4I i B,a ton d�bn.cotB,aa =.a Y 1� <br /> as <br /> B b sin d e a l cos B,b=%/ o a e-a s • <br /> 4 aS 1—s <br /> 41— ..B, b, a B—900—A,b m a cotd,a s a—j - <br /> a,a B.m 9p°—d,a m tan d a a b <br /> em A. <br /> 4. B,a, b B=90°—dra=asind,b.0cad, <br /> lution of Oblique Triaagles <br /> 41100W 'Required a b a b=asinB ° asin o <br /> „► S"',� S k 3 _ sin d = 180--(d+ ,a a Ma 1! <br /> s -�� --- C d, a, b B a a sin B= b eia .. _ ° a sia.O <br /> y y e l a b. a A,A y d+B=180=o,.tan Itd-B)=(a—b taa j cd+B) <br /> 0• da 7 �'b� <br /> 0 =4wa a+b <br /> S.J T RETURN YD - q b. = <br /> ■in JA8—aa—o p <br /> 3 CO NTY SURVEYOR'S OFFICE *" 2 Y be ' <br /> l/ siQ B t B a e° ,a-180°--(d+B) <br /> "W J 7 ` 'STOCKTON — CALIFORNIA a,"b. s Afea •tea_ ti. V <br /> ! T 2 area •a-a a— •-a <br /> F <br /> d b, a Area =b Baia d <br /> 2 _ <br /> a'ria B sin d <br /> ' B,C,a Ares area = ; <br /> 2 am'd � r <br /> RILDUCTION TQ HORWO?4TALdke <br /> ` <br /> distil .: <br /> • <br /> wAsstt of <br /> ' Jim 71 <br /> . <br /> r <br /> Y <br />