Calculus (3rd Edition)

$$v= \langle \sqrt 3 ,1\rangle.$$
A vector $v$ of length $2$ is given by $$v=2\langle \cos 30, \sin 30\rangle=2\langle \frac{\sqrt 3}{2},\frac{1}{2}\rangle=\langle \sqrt 3 ,1\rangle.$$