Mathematics

Mathematics

Problem

Which of the following is an equivalent form of cos⁡2θ\cos 2\theta expressed solely in terms of sin⁡θ\sin \theta? a) 2sin⁡θcos⁡θ2\sin\theta\cos\theta b) 1−2sin⁡2θ1-2\sin^2\theta c) 1−sin⁡2θ1-\sin^2\theta d) 1+2sin⁡2θ1+2\sin^2\theta

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