$\displaystyle \sin\alpha= \frac{\sqrt{6}}{3}$\displaystyle \sin\alpha= \frac{\sqrt{6}}{3}

$\displaystyle \sin\alpha= \frac{\sqrt{2}}{2}$\displaystyle \sin\alpha= \frac{\sqrt{2}}{2}

$\displaystyle \sin\alpha= \frac{\sqrt{3}}{2}$\displaystyle \sin\alpha= \frac{\sqrt{3}}{2}

$\displaystyle \sin\alpha= \frac{\sqrt{3}}{3}$\displaystyle \sin\alpha= \frac{\sqrt{3}}{3}