Teaching BPSC 4.0 बिहार उच्च माध्यमिक शिक्षक भर्ती (PGT) Mock Test Mathematics Three Dimensional Geometry Direction ratios and Direction cosines
If \(\frac{{x - 1}}{l} = \frac{{y - 2}}{m} = \frac{{z + 1}}{n}\) is the equation of the line passing through (1, 2, -1) and (-1, 0, 1), then (l, m, n) is:
1
(-1, 0, 1)
2
(1, 1, -1)
3
(1, 2, -1)
4
More than one of the above
5
None of the above