Level:
Project ID:
2010009804
Source Problem:
Accepted:
0
Clonable:
1
Easy:
0
The solution set of the equation \( \mathrm{tg}\, x - \mathrm{cotg}\,x = 0 \) for \( x\in\mathbb{R} \) is:
\( \bigcup\limits_{k\in\mathbb{Z}}\left\{\frac{\pi}4+k\pi;\frac{3\pi}4+k\pi\right\} \)
\( \bigcup\limits_{k\in\mathbb{Z}}\left\{k\pi;\frac{\pi}4+k\pi\right\} \)
\( \bigcup\limits_{k\in\mathbb{Z}}\left\{\frac{\pi}4+k\pi\right\} \)
\( \bigcup\limits_{k\in\mathbb{Z}}\left\{\frac{3\pi}4+k\pi\right\} \)