Mathematics

Mathematics

Problem

Which of the following equals sin⁡2θ\sin 2\theta? a) cos⁡2θ−sin⁡2θ\cos^{2}\theta-\sin^{2}\theta b) sin⁡θcos⁡θ\sin\theta\cos\theta c) 2sin⁡θcos⁡θ2\sin\theta\cos\theta d) 2tan⁡θ1−tan⁡2θ\dfrac{2\tan\theta}{1-\tan^{2}\theta}

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