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Rovnica s trigonometrickými funkciami
Rieš v \( \mathbb{R} \) rovnici:
\( 1-\sin ^{2} x=\cos ^{2} x+\cos x \)
\( K=\bigcup_{k \in \mathbb{Z}}\left\{k \pi\right\} \)
\( K=\bigcup_{k \in \mathbb{Z}}\left\{\frac{\pi}{4}+k \pi\right\} \)
\( K=\bigcup_{k \in \mathbb{Z}}\left\{\frac{3\pi}{2}+k \pi\right\} \)
\( K=\bigcup_{k \in \mathbb{Z}}\left\{\frac{\pi}{2}+k \pi\right\} \)