Mathematics - Functions Question with Solution | TestHub

$\mathrm{x}\in [2\mathrm{n}\pi ,2\mathrm{n}\pi +\pi ],\mathrm{y}\in \{0,1\}$

$\mathrm{x}\in (0,\infty ),\mathrm{y}\in \{1\}$

$\mathrm{x}\in {\bigcup }_{\mathrm{n}\in \mathrm{W}}\left(2\mathrm{n}\pi ,2\mathrm{n}\pi +\frac{\pi }{2}\right)\cup \left(2\mathrm{n}\pi +\frac{\pi }{2},(2\mathrm{n}+1)\pi \right)$ and $\mathrm{y}\in \{0\}$

$\mathrm{x}\in {\bigcup }_{\mathrm{n}\in \mathrm{W}}(2\mathrm{n}\pi ,(2\mathrm{n}+1)\pi )$ and $\mathrm{y}\in \{0,1\}$