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Úhel mezi vektory
Urči velikost úhlu mezi následujícími vektory:
\( \large\left(-1;7\right)\:\large{a\:}\left(8,10\right) \)
\( \textrm{cos} (\varphi) =\frac{60}{\sqrt{50}\ .\ \sqrt{164}} \)
\( \varphi \doteq 45^{\circ}{30}' \)
\( \textrm{cos} (\varphi) =\frac{62}{\sqrt{60}\ .\ \sqrt{164}} \)
\( \varphi \doteq 50^{\circ}{10}' \)
\( \textrm{cos} (\varphi) =\frac{62}{\sqrt{50}\ .\ \sqrt{150}} \)
\( \varphi \doteq 48^{\circ}{20}' \)
\( \textrm{cos} (\varphi) =\frac{62}{\sqrt{50}\ .\ \sqrt{164}} \)
\( \varphi \doteq 46^{\circ}{47}' \)