Q25. Which of the following trigonometric identities is correct?Mathematics — NUST Mock 7 — Question 25 of 200A. cos(a + b) = cos a cos b + sin a sin bB. cos(a - b) = cos a cos b + sin a sin bC. sin(a - b) = cos a cos b + sin a sin bD. sin(a - b) = sin a sin b + cos a cos bPractice more Mathematics MCQs for entrance exam preparation on Examora.io.← Previous Question Next Question →