Answer
$\lt \dfrac{-\sqrt 3}{2},\dfrac{-1}{2} \gt$
Work Step by Step
The unit vector will make an angle with positive x-axis be: $120^{\circ} + 90^{\circ}=210^{\circ}$ when the vector $\lt 0,1 \gt $ is making an angle with counterclockwise positive x-axis.
Hence, we have
$\lt \cos (210^{\circ}), \sin (210^{\circ}) \gt=\lt \dfrac{-\sqrt 3}{2},\dfrac{-1}{2} \gt$
