$\left\langle \frac{2}{\sqrt{13}}, \frac{-3}{\sqrt{13}} \right\rangle$

$\left\langle \frac{2}{\sqrt{13}}, \frac{3}{\sqrt{13}} \right\rangle$

$\left\langle \frac{1}{\sqrt{13}}, \frac{-\sqrt{12}}{\sqrt{13}} \right\rangle$

$\left\langle -\frac{2}{\sqrt{13}}, \frac{3}{\sqrt{13}} \right\rangle$