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Riešenie trigonometrickej rovnice
Rieš v \( \mathbb{R}-\left\{\frac{\pi}{2}+\frac{k \pi}{2};k\in\mathbb{Z}\right\} \) rovnicu \( \frac{(\operatorname{tg} x-\operatorname{cotg} x)^{2}}{\operatorname{cotg}^{2} x+\operatorname{tg}^{2} x}+\frac{2}{\operatorname{tg}^{2} x+\operatorname{cotg}^{2} x}=\sin x \)
\( K=\emptyset \)
\( K=\{1, -1\} \)
\( K=\{0\} \)
\( K=\mathbb{R} \)