engineering mathematics MCQ #4932

If sin(3x) = sin(x), then x =

engineering mathematics MCQ #4932

  1. Question 1

    Q1. If sin(3x) = sin(x), then x =

    • A) nπ or nπ ± π/2
    • B) nπ
    • C) nπ/2
    • D) nπ or 2nπ ± π/4

    Answer: nπ

    Explanation: Use the identity sin(3x) - sin(x) = 0, then apply sum-to-product identity and solve.