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Re: Trigonometry For SSC CGL Exam Pdf
In SSC CGL exam trigonometry questions and answers for SSC exams provides a great deal of excellent information on trigonometry to all aspirants preparing for trigonometry section of SSC exam. Here I’m attaching PDF of Notes of Trigonometry for SSC CGL Exam: Important Short Tricks on Trigonometric Identities Pythagorean Identities sin2 θ + cos2 θ = 1 tan2 θ + 1 = sec2 θ cot2 θ + 1 = csc2 θ Negative of a Function sin (–x) = –sin x cos (–x) = cos x tan (–x) = –tan x csc (–x) = –csc x sec (–x) = sec x cot (–x) = –cot x If A + B = 90o, Then Sin A = Cos B Sin2A + Sin2B = Cos2A + Cos2B = 1 Tan A = Cot B Sec A = Csc B For example: If tan (x+y) tan (x-y) = 1, then find tan (2x/3)? Solution: Tan A = Cot B, Tan A*Tan B = 1 So, A +B = 90o (x+y)+(x-y) = 90o, 2x = 90o , x = 45o Tan (2x/3) = tan 30o = 1/√3 If A – B = 90o, (A › B) Then Sin A = Cos B Cos A = – Sin B Tan A = – Cot B |
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