engineering mathematics MCQ #656

If y = cos(2x), find dy/dx

engineering mathematics MCQ #656

  1. Question 1

    Q1. If y = cos(2x), find dy/dx

    • A) -2sin(2x)
    • B) 2sin(2x)
    • C) -sin(2x)
    • D) sin(2x)

    Answer: -2sin(2x)

    Explanation: Using chain rule, if y = cos(2x), then dy/dx = -2sin(2x)