engineering mathematics MCQ #674

If y = cos(x² + 1), then dy/dx = ?

engineering mathematics MCQ #674

  1. Question 1

    Q1. If y = cos(x² + 1), then dy/dx = ?

    • A) -2x sin(x² + 1)
    • B) 2x sin(x² + 1)
    • C) -sin(x² + 1)
    • D) sin(x² + 1)

    Answer: -2x sin(x² + 1)

    Explanation: Using chain rule, dy/dx = -sin(x² + 1) * d(x² + 1)/dx = -2x sin(x² + 1).