Teaching UP B.Ed (Paper 1 & 2) Mock Test 2025 Mathematics Three Dimensional Geometry Angle between two lines
The value of λ, so that the lines \(\rm \frac{1-x}{3}=\frac{7y-14}{2\lambda}=\frac{z-3}{2}\) and \(\rm \frac{7-7x}{3\lambda}=\frac{y-5}{1}=\frac{6-z}{5}\) are perpendicular is
1
-70/11
2
70/11
3
11/70
4
-11/70