defence exam Coast Guard Navik GD (General Duty) 02/2025 Mock Test Series Mathematics Circles Chord of Contact
If the circle x2 + y2 = a2 cuts off a chord of length 2b from the line y = mx + c, then
1
(1 - m2) (a2 + b2) = c2
2
(1 + m2) (a2 - b2) = c2
3
(1 - m2) (a2 - b2) = c2
4
None of these