Teaching EMRS PGT Mock Test 2023 Mathematics Three Dimensional Geometry Direction ratios and Direction cosines
The Direction Ratios of the line whose direction cosines are given by the equations
3l + m + 5n = 0, 6mn - 2nl + 5lm = 0:1
- 3n, n, n
2
- n, - 2n, n and - 2n, n, n
3
n, 3n, - 3n
4
n, - 2n, - 3n