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Řešení rovnice cos x = -1/2
Vyřeš v \( \R \) rovnici:
\( \large \cos x = -\Large \frac{3}{6}\large \)
\( \large K = \bigcup\limits_{k\in\mathbb{Z}} \left \{\Large \frac{{\pi}}{3}\large + 2k \pi;\Large \frac{{5 \pi}}{3}\large + 2k \pi \right \} \)
\( \large K = \bigcup\limits_{k\in\mathbb{Z}} \left \{\Large \frac{{\pi}}{2}\large + 2k \pi;\Large \frac{{3 \pi}}{2}\large + 2k \pi \right \} \)
\( \large K = \bigcup\limits_{k\in\mathbb{Z}} \left \{\Large \frac{{2 \pi}}{3}\large + 2k \pi;\Large \frac{{4 \pi}}{3}\large + 2k \pi \right \} \)
\( \large K = \bigcup\limits_{k\in\mathbb{Z}} \left \{\Large \frac{{\pi}}{4}\large + 2k \pi;\Large \frac{{7 \pi}}{4}\large + 2k \pi \right \} \)