A metallic $L$ shape pipe is subjected to two forces as shown in the figure below. The force in cable $AB$ is $3$ KN $.$ Given $F_{AC}=-2\mathrm{.}34i-1\mathrm{.}872K(KN)$

The force $F_{AB}(KN)$ as a vector is represented as $$

The projection of $F_{AC}$ along $AB$ in $KN$ is $$

The angle between $AB$ and $AC$ is $$

$0\mathrm{.}85i+0\mathrm{.}85j-2\mathrm{.}033k,-0\mathrm{.}705i+0\mathrm{.}705j-2\mathrm{.}826k$

$1\mathrm{.}86,2\mathrm{.}31,1\mathrm{.}71,1\mathrm{.}63$

$26\mathrm{.}82,39\mathrm{.}54,45\mathrm{.}38,49\mathrm{.}67$