Answer
$\textbf{u}=\langle 4,4\sqrt 3 \rangle$
Work Step by Step
Step 1: $\textbf{u}=\langle 8\cos60^{\circ},8\sin60^{\circ} \rangle$
Step 2: $\textbf{u}=\langle 8(\frac{1}{2}),8(\frac{\sqrt 3}{2}) \rangle$
Step 3: $\textbf{u}=\langle \frac{8}{2},\frac{8\sqrt 3}{2} \rangle$
Step 4: $\textbf{u}=\langle 4,4\sqrt 3 \rangle$
