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Riešenie trigonometrickej rovnice
Rieš v \( \mathbb{R} \) rovnicu \( \frac{\operatorname{tg} x}{\operatorname{cotg} x} \cdot \frac{1}{\operatorname{tg} x}=1 \).
\( K=\bigcup_{k \in \mathbb{Z}}\left\{\frac{\pi}{4}+k \pi\right\} \)
\( K=\bigcup_{k \in \mathbb{Z}}\left\{\frac{\pi}{6}+k \pi\right\} \)
\( K=\bigcup_{k \in \mathbb{Z}}\left\{\frac{3\pi}{4}+k \pi\right\} \)
\( K=\bigcup_{k \in \mathbb{Z}}\left\{\frac{\pi}{2}+k \pi\right\} \)