Teaching DSSSB TGT Mock Test 2025 Mathematics Three Dimensional Geometry Direction ratios and Direction cosines
The direction cosines of the ray P(1, -2, 4) to Q(-1, 1, -2) are
1
<-2, 3, -6>
2
<2, -3, 6>
3
\(\left\langle \frac{2}{7},-\frac{3}{7},\frac{6}{7} \right\rangle\)
4
\(\left\langle -\frac{2}{7},\frac{3}{7},-\frac{6}{7} \right\rangle\)