Q81. What is the derivative of the infinite series: 1 - x2/2! + x4/4! - x6/6! + ... ?Mathematics — NUST Mock 1 — Question 81 of 200A. cos(x)B. -sin(x)C. tan(x)D. Not possiblePractice more Mathematics MCQs for entrance exam preparation on Examora.io.← Previous Question Next Question →