engineering mathematics MCQ #465

The radius of the director circle of the ellipse x²/a² + y²/b² = 1 is

engineering mathematics MCQ #465

  1. Question 1

    Q1. The radius of the director circle of the ellipse x²/a² + y²/b² = 1 is

    • A) √(a² + b²)
    • B) √(a² - b²)
    • C) a + b
    • D) a - b

    Answer: √(a² + b²)

    Explanation: The director circle of an ellipse has the equation x² + y² = a² + b², hence its radius is √(a² + b²).