CUET and UG exam CUET UG 2025 Mock Test Series Mathematics Three Dimensional Geometry Angle between two lines
If the angle between two lines whose d.rs are 1, 2, p − 1 and -3, 1, 2 is 90°, then p is
1
3/2
2
-3/2
3
2
4
-2
If the angle between two lines whose d.rs are 1, 2, p − 1 and -3, 1, 2 is 90°, then p is