defence exam Coast Guard Navik GD (General Duty) 02/2025 Mock Test Series Mathematics Circles Tangents and Normals
If the line y = mx + c is a tangent to the circle x2 + y2 = a2 then find condition of tangency ?
1
c2 = a2 (1 + m2)
2
c2 = - a2 (1 + m2)
3
Both 1 and 2
4
None of these