Question

what is the formula of Sin 2x

Answer 1

We use the formula cos (A +B) = Cos A cos B - sin A sin B, to obtain the formulæ of cos 2x. The formulas of cos(2x) as following: Cos (2x)= 2(cosx)^2–1. Cos (2x)=1–2(sinx)^2.

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Answer 2

Answer:

Step-by-step explanation:

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