One of the expressions below is equal to sin2A \sin 2A\,sin2A for all values of AAA.
Identify this expression.
Select the correct answer.
2sinAcosA2\sin A\cos A2sinAcosA
sinAcosA\sin A\cos AsinAcosA
2sinA2\sin A2sinA
sin2A−cos2A\sin^2 A - \cos^2 Asin2A−cos2A