kat-a-jest-najmniejszym-z-katow-trojkata-prostokatnego-o-bokach

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

$\displaystyle \cos\alpha= \frac{1}{2}$\displaystyle \cos\alpha= \frac{1}{2}

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

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