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Cos1 (–x) = π – cos1 x;Sin(2x) = 2 sin x cos x (in terms of sin and cos) sin(2x) = (2tan x) /(1 tan 2 x) (in terms of tan) These are the main formulas of sin 2x But we can write this formula in terms of sin x (or) cos x alone using the trigonometric identity sin 2 x cos 2 x = 1 They are sin 2x = 2 √(1 cos 2 x) cos x (sin 2x formula in terms of cos) sin 2x = 2 sin x √(1 sin 2 x) (sin 2x formula in terms of sin)Sin(x y) = sinxcosy cosxsiny sin(x y) = sinxcosy cosxsiny cos(x y) = cosxcosy sinxsiny cos(x y) = cosxcosy sinxsiny tan(x y) = tanxtany 1 tanxtany tan(x y) = tanx tany 1tanxtany HalfAngle Formulas sin 2 = q 1 cos 2 cos 2 = q 1cos 2 tan 2 = q 1cos tan 2 = 1 cosx sinx tan 2 = sin 1cos DoubleAngle Formulas sin2 = 2sin cos cos2 = cos2 sin2 tan2 = 2tan 1 tan2 Summary Of Trigonometric Identities 1-cos x formula in terms of sin

If Cos 1 X 2 Cos 1 Y 3 A Then Prove That 9x 2 12xy Cos A 4y 2 36 Sin 2 A Sarthaks Econnect Largest Online Education Community Sin inverse x + cos inverse x formula

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