Practicing Success
Practicing Success
CUET Preparation Today
Let \(l,m,n\) be the direction cosines of a vector then |
\(l^2+m^2=n^2\) \(l^2+m^2+n^2=1\) \(l^2+m^2+n^2=2\) None of the above |
\(l^2+m^2+n^2=1\) |
| Well known identity \(l^{2}+m^{2}+n^{2}=1\) |
