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Goniometrická rovnice
Vyřeš v \( \mathbb{R} \) goniometrickou rovnici:
\( \operatorname{cotg} x=\frac{-1}{\sqrt{3}} \)
\( K=\bigcup_{k \in \mathbb{Z}}\left\{\frac{4 \pi}{3}+k \pi\right\} \)
\( K=\bigcup_{k \in \mathbb{Z}}\left\{\frac{2 \pi}{3}+k \pi\right\} \)
\( K=\bigcup_{k \in \mathbb{Z}}\left\{\frac{5 \pi}{6}+k \pi\right\} \)
\( K=\bigcup_{k \in \mathbb{Z}}\left\{\frac{\pi}{3}+k \pi\right\} \)