Q40. The function f is defined for 0° ≤ x ≤ 180° by f(x) = A + 5cos(Bx), where A and B are constants. Given that the period of f is 120°, what is the value of B?Mathematics — NUST Mock 10 — Question 40 of 200A. 3B. -3C. 5D. -2Practice more Mathematics MCQs for entrance exam preparation on Examora.io.← Previous Question Next Question →