Q54. Which of the following is a valid trigonometric identity for cos(2α)?Mathematics — NUST Mock By IBAGRADS 1 — Question 54 of 200A. cos2(α) - sin2(α)B. cos2(α) + sin2(α)C. 2sin(α)cos(α)D. sin2(α) - cos2(α)Practice more Mathematics MCQs for entrance exam preparation on Examora.io.← Previous Question Next Question →