Question

The square of the length of the tangent from
(3, – 4) on the circle x²+y²–4x – 6y + 3 = 0 is –

• A. 20
• B. 30
• C. 40
• D. 50

Answer 1

Answer: (C)

40

Answer 2

Length of tangent = $\sqrt { \mathrm { S } _ { 1 } }$

length)² = S₁ = 9 + 16 – 12 + 24 + 3 = 40