Question

Find direction angles and direction cosines of the following vectors :
$\hat{j}+\hat{k}$

Answer 1

Direction ratios of the vector are $0,1,1$

Direction cosines of the vector are

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