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Trigonometry Trigonometry is the branch of mathematics that deals with the study of the relationships between the sides and angles of a triangle, especially a right-angled triangle. c& ge 2 rc) 4 =i © 0 Adjacent sind = opposite oscO = hypotenuse hypotenuse opposite adjacent _ hypotenuse a sec) = sain hypotenuse adjacent it tang = Opposite euke = adjacent adjacent opposite Identities: 1. sin?A+cos?A=1 2. sec2A - tan2A=1 3. cosec2- cot2A=1 IMPORTANT BASIC THINGS TO KNOW: e If, cosecA-cotA=1 then : cosecA+cotA=1/cosecA-cotA e If, secA+tanA=1/secA-tanA then : secA-tanA=1 e But sinA+cosA = 1/sinA+cosA This is important for MCQs ip a ee 2 dan & Cae : tol © 2 hoes to : | oa i tose. @ - Cok OeP. Vdondicfies | seco + cote => _@® Sin2e + [0370 21 ees oko .@ gec* 0 agrees lh ee nes T@) coace? 6 = col OH! : f Le - o gsioe toto ee 60" Go" Ve ] Yo, 0 13 Nb RAE) 
