Conversion Factors And Common Formulas ([email protected]) (S&I, Training Media Support Team, Individual Training Support Directorate, Army Training Support Center, Bldg 3306 Room 2, Wilson Ave, Fort Eustis, Va 23604)
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LAWS OF SINE, COSINE, AND TANGENT B In any triangle c a C *GTA 05-02-029 A b Law of Sines sin A a = sinb B = sin C c 1 April 05 Law of Cosines a2 = b2 + c2 – 2bc cos A b2 = a2 + c2 – 2ac cos B c2 = a2 + b2 – 2ab cos C Law of Tangents a + b = tan[½(A + B)] Conversion a - b = tan[½(A - B)] ALGEBRAIC SIGNS OF TRIG FUNCTIONS BY QUADRANT Factors 0° Quad I Quad II Quad III Quad IV all positive (+) sin (+), cos (-), tan (-) sin (-), cos (-), tan (+) sin (-), cos (+), tan (-) 270° IV III I II 90° and TR
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