trigonometry formulas pdf

(ii) cos A. cosec B = 1 or sec A = cosec B. Trigonometry problems are very diverse and learning the below formulae help in solving them better. Results that are true always : (i) sin A. sec B = 1 or sin A = cos B. Trigonometry Formulas: sin(−θ) = −sin θ: cos(−θ) = cos θ: tan (− θ) = − tan θ: c o s e c (− θ) = − c o s e c θ: sec (− θ) = sec θ: cot (− θ) = − cot θ: Product to Sum Formulas: sin x sin y = 1/2 [cos(x–y) − cos(x+y)] cos x cos y = 1/2[cos(x–y) + cos(x+y)] sin x cos y = 1/ 2 [sin (x + y) + sin (x − y)] This Trigonometry Formulas is very useful for in the revision before the school exams or competitive exams like SSC, IBPS, CAT, NTSE etc. TRIGONOMETRY Compound & Double angle formulae In order to master this section you must first learn the formulae, even though they will be given to you on the matric formula sheet. Product identities. Trig Cheat Sheet Definition of the Trig Functions Right triangle definition For this definition we assume that 0 2 p <