engineering mathematics MCQ #374

Line y = mx + c touches circle x² + y² = r² if:

engineering mathematics MCQ #374

  1. Question 1

    Q1. Line y = mx + c touches circle x² + y² = r² if:

    • A) c = r√(1 + m²)
    • B) c = r²√(1 - m²)
    • C) c = r/√(1 + m²)
    • D) c = r√(1 - m²)

    Answer: c = r√(1 + m²)

    Explanation: Condition for tangency: c² = r²(1 + m²) → c = r√(1 + m²).