engineering mathematics MCQ #4948

If sin(2x) + sin(4x) = 0, then x =

engineering mathematics MCQ #4948

  1. Question 1

    Q1. If sin(2x) + sin(4x) = 0, then x =

    • A) nπ/3
    • B) nπ/2
    • C) nπ
    • D) nπ/6

    Answer: nπ/3

    Explanation: Using sum-to-product, 2sin(3x)cos(x) = 0, hence sin(3x) = 0, giving 3x = nπ, so x = nπ/3.