Question

Find the direction of the vector in standard position with the endpoint (8,9)

Answer 1

if it's on standard position, it means is "stemming" from the origin and goes up to 8,9 then

that simply means
`\bf \begin{array}{llll} 8&,&9\\ \uparrow &&\uparrow \\ x&&y \end{array}\qquad \theta=tan^(-1)\left( \cfrac{y}{x} \right)\implies \theta=tan^(-1)\left( \cfrac{9}{8} \right)`