Mathematics

Mathematics

Problem

For an acute angle θ\theta, which of the following is always equal to sin⁡2θ\sin^{2}\theta? a) sec⁡2θ−1\sec^{2}\theta-1 b) cos⁡2θ\cos^{2}\theta c) 1−cos⁡2θ1-\cos^{2}\theta d) 1−tan⁡2θ1-\tan^{2}\theta

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