Question

Find direction angles and direction cosines of the following vectors :
$(1,0,-1)$

Answer 1

Direction ratios of the line are $1,0,-1$

Direction cosines of the line are

$\frac{1}{\sqrt{{\left(1\right)}^2+{\left(0\right)}^2+{(-1)}^2}},\frac{0}{\sqrt{{\left(1\right)}^2+{\left(0\right)}^2+{(-1)}^2}},\frac{-1}{\sqrt{{\left(1\right)}^2+{\left(0\right)}^2+{(-1)}^2}}\frac{1}{\sqrt{2}},0,\frac{-1}{\sqrt{2}}$