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Trigonometry Help: sin2x cos2x ; (sinx+cosx)^2 ; cos^4 x - sin^4 x ; 2sinx csc2x ; 2cotx/(1+cot^2 x) (Calculus Physics Chem Accounting Tam Mai Thanh Cao) View |
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Prove the Trigonometric Identity: (sin 2x)/(sin x) - (cos 2x)/(cos x) = sec x (MathswithMohan) View |
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Trigonometry Help: Find the solutions of x: cos2x + 5sinx + 2 = 0 - Techniques (Calculus Physics Chem Accounting Tam Mai Thanh Cao) View |
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Equazioni goniometriche lineari in Seno e Coseno. (Prof. Alfonso Amendola) View |
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