Teaching HTET PGT Level 3 - 2024 Mock Test Mathematics Three Dimensional Geometry Direction ratios and Direction cosines
If l, m, n are the direction cosines of the line x - 1 = 2(y + 3) = 1 - z, then what is l4 + m4 + n4 equal to?
1
1
2
\(\dfrac{11}{27}\)
3
\(\dfrac{13}{27}\)
4
4