engineering mathematics MCQ #4943

The general solution of cos(2x) = cos(π/4) is

engineering mathematics MCQ #4943

  1. Question 1

    Q1. The general solution of cos(2x) = cos(π/4) is

    • A) nπ ± π/8
    • B) 2nπ ± π/8
    • C) nπ + π/8
    • D) 2nπ + π/8

    Answer: nπ ± π/8

    Explanation: For cos(2x) = cos(π/4), 2x = 2nπ ± π/4, hence x = nπ ± π/8.