1003085801

Level: 
Project ID: 
1003085801
Source Problem: 
Accepted: 
1
Clonable: 
1
Easy: 
0
The solution set of the inequality \( \cos x > 0.5 \) for \( x\in\mathbb{R} \) is:
\( \bigcup\limits_{k\in\mathbb{Z}}\left(-\frac{\pi}3+2k\pi;\ \frac{\pi}3+2k\pi\right) \)
\( \bigcup\limits_{k\in\mathbb{Z}}\left(-\frac{\pi}3+k\pi;\ \frac{\pi}3+k\pi\right) \)
\( \bigcup\limits_{k\in\mathbb{Z}}\left(-\frac{\pi}3+2k\pi;\ k\pi\right) \)
\( \bigcup\limits_{k\in\mathbb{Z}}\left(-\frac{\pi}3+2k\pi;\ 2k\pi\right) \)