Q51. Given the function f(x) = cos(x)cos(2x)cos(4x)cos(8x)cos(16x), find the value of its derivative at x = π/4, denoted as f'(π/4).Mathematics — NUST Mock By IBAGRADS 5 — Question 51 of 200A. √2B. -√2C. 2D. -2Practice more Mathematics MCQs for entrance exam preparation on Examora.io.← Previous Question Next Question →