engineering mathematics MCQ #4914

The general solution of the equation cos(2x) = cos(x) is

engineering mathematics MCQ #4914

  1. Question 1

    Q1. The general solution of the equation cos(2x) = cos(x) is

    • A) 2nπ
    • B) 2nπ/3
    • C) 2nπ or 2nπ/3
    • D) nπ/3

    Answer: 2nπ or 2nπ/3

    Explanation: Using the identity cos(a) = cos(b), we have 2x = 2nπ ± x, giving two sets of solutions: 2nπ and 2nπ/3.