engineering mathematics MCQ #518

Equation of tangent to circle x² + y² = 25 at (3,4):

engineering mathematics MCQ #518

  1. Question 1

    Q1. Equation of tangent to circle x² + y² = 25 at (3,4):

    • A) 3x + 4y = 25
    • B) 3x + 4y = 12
    • C) 4x - 3y = 25
    • D) 3x - 4y = 25

    Answer: 3x + 4y = 25

    Explanation: Tangent formula: xx1 + yy1 = r² → 3x + 4y = 25.