engineering mathematics MCQ #640

If y = sin(x) + cos(x), find dy/dx at x = π/4

engineering mathematics MCQ #640

  1. Question 1

    Q1. If y = sin(x) + cos(x), find dy/dx at x = π/4

    • A) 0
    • B) 1
    • C) √2
    • D) 1 / √2

    Answer: 0

    Explanation: dy/dx = cos(x) - sin(x), at x = π/4, dy/dx = cos(π/4) - sin(π/4) = 1/√2 - 1/√2 = 0