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Riešenie rovnice s tangens
Vyrieš v \( \mathbb{R} \) rovnicu \( \operatorname{tg} x=-\frac{\sqrt{3}}{3} \).
\( K=\bigcup_{k \in \mathbb{Z}}\left\{\frac{5 \pi}{6}+2 k \pi ; \frac{11 \pi}{6}+2 k \pi\right\}=\bigcup_{k \in \mathbb{Z}}\left\{\frac{5 \pi}{6}+k \pi\right\} \)
\( K=\bigcup_{k \in \mathbb{Z}}\left\{\frac{5 \pi}{6}+2 k \pi ; \frac{13 \pi}{6}+2 k \pi\right\}=\bigcup_{k \in \mathbb{Z}}\left\{\frac{5 \pi}{6}+k \pi\right\} \)
\( K=\bigcup_{k \in \mathbb{Z}}\left\{\frac{5 \pi}{6}+2 k \pi ; \frac{9 \pi}{6}+2 k \pi\right\}=\bigcup_{k \in \mathbb{Z}}\left\{\frac{5 \pi}{6}+k \pi\right\} \)
\( K=\bigcup_{k \in \mathbb{Z}}\left\{\frac{7 \pi}{6}+2 k \pi ; \frac{11 \pi}{6}+2 k \pi\right\}=\bigcup_{k \in \mathbb{Z}}\left\{\frac{7 \pi}{6}+k \pi\right\} \)