Část:
Project ID:
2010009805
Source Problem:
Accepted:
0
Clonable:
1
Easy:
0
Množina řešení nerovnice \( |\cos x| \leq \frac12 \) pro \( x\in\mathbb{R} \) je:
\( \bigcup\limits_{k\in\mathbb{Z}}\left\langle\frac{\pi}3+k\pi;\frac{2\pi}3+k\pi\right\rangle \)
\( \bigcup\limits_{k\in\mathbb{Z}}\left\langle-\frac{\pi}3+k\pi;\frac{\pi}3+k\pi\right\rangle \)
\( \bigcup\limits_{k\in\mathbb{Z}}\left\langle\frac{\pi}3+k\pi; \infty\right) \)
\( \bigcup\limits_{k\in\mathbb{Z}}\left\langle\frac{\pi}3+k\pi;\frac{4\pi}3+k\pi\right\rangle \)