Mathematics

Mathematics

Problem

To rewrite sin⁡2θ\sin^{2}\theta solely in terms of cos⁡θ\cos \theta, which of the following expressions should replace sin⁡2θ\sin^{2}\theta? a) 1−cos⁡θ1-\cos\theta b) 1−cos⁡2θ1-\cos^{2}\theta c) sec⁡2θ−1\sec^{2}\theta-1 d) 1+cos⁡2θ1+\cos^{2}\theta

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