Mathematics

Mathematics

Problem

Which of the following is identically equal to cos⁡2θ\cos^2 \theta for every acute angle θ\theta? a) 1+sin⁡2θ1+\sin^2 \theta b) 1−tan⁡2θ1-\tan^2 \theta c) 1−sin⁡2θ1-\sin^2 \theta d) sec⁡2θ−1\sec^2 \theta-1

Browse the problem library