Teaching BPSC 4.0 बिहार उच्च माध्यमिक शिक्षक भर्ती (PGT) Mock Test 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
More than one of the above
5
None of the above