engineering mathematics MCQ #5213

What is the amplitude of 3sin(x) + 4cos(x)?

engineering mathematics MCQ #5213

  1. Question 1

    Q1. What is the amplitude of 3sin(x) + 4cos(x)?

    • A) 3
    • B) 4
    • C) 5
    • D) 7

    Answer: 5

    Explanation: The amplitude of asin(x) + bcos(x) is √(a² + b²), so here it's √(3² + 4²) = √(9 + 16) = √25 = 5.