0 %
Úhel mezi rovinami
Urči úhel mezi rovinami \( \large\alpha:-2x+y-3z=1{\:{a}}\:\beta:2x-y-z=1 \).
\( \large{\phi}\doteq90\degree45^{\prime} \)
\( \large{\phi}\doteq60\degree15^{\prime} \)
\( \large{\phi}\doteq80\degree30^{\prime} \)
\( \large{\phi}\doteq77\degree24^{\prime} \)