Teaching HSSC TGT 2023 Mock Test (Latest Pattern) Mathematics Three Dimensional Geometry Angle between two lines
The angle between the lines whose direction ratios satisfy the equations l + m + n = 0 and l2 = m2 + n2 is
1
\(\frac{\pi}{2}\)
2
\(\frac{\pi}{3}\)
3
\(\frac{\pi}{4}\)
4
\(\frac{\pi}{6}\)
5
Not Attempted