Liczba 30° - 30° jest równa

$\sqrt{3}-1$\sqrt{3}-1

$\displaystyle - \frac{\sqrt{3}}{6}$\displaystyle - \frac{\sqrt{3}}{6}

$\displaystyle \frac{\sqrt{3}-1}{6}$\displaystyle \frac{\sqrt{3}-1}{6}

$\displaystyle \frac{2\sqrt{3}-3}{6}$\displaystyle \frac{2\sqrt{3}-3}{6}