engineering mathematics MCQ #411

The equation of the chord of contact of the tangents drawn from (4, 2) to the circle x² + y² = 16 is

engineering mathematics MCQ #411

  1. Question 1

    Q1. The equation of the chord of contact of the tangents drawn from (4, 2) to the circle x² + y² = 16 is

    • A) 4x + 2y = 16
    • B) 4x + 2y = 8
    • C) 2x + 4y = 16
    • D) 2x + y = 8

    Answer: 4x + 2y = 16

    Explanation: The chord of contact of tangents drawn from (x1, y1) to the circle x² + y² = a² is xx1 + yy1 = a². Here, x1 = 4, y1 = 2, a² = 16.