Mathematics - 3D-Coordinate Geometry Question with Solution | TestHub

Projection of a vector on coordinate axis are $x_2-x_1,y_2-y_1,z_2-z_1$ $$\begin{array}{rl}& x_2-x_1=6,y_2-y_1=-3,z_2-z_1=2\\ & \sqrt{{\left(x_2-x_1\right)}^2+{\left(y_2-y_1\right)}^2+{\left(z_2-z_1\right)}^2}=\sqrt{36+9+4}=7\end{array}$$ The D.C's of the vector are $\frac{6}{7},-\frac{3}{7},\frac{2}{7}$