defence exam Coast Guard Navik GD (General Duty) 02/2025 Mock Test Series Mathematics Three Dimensional Geometry Angle between two lines
One of the bisectors of the angle between the lines a(x – 1)2 + 2h(x – 1)(y – 2) + b(y – 2)2 = 0 is x + 2y – 5 = 0. The other bisector is
1
2x – y = 0
2
x + 2y = 0
3
2x – y + 4 = 0
4
2x – y + 3 = 0