`~rai~`
\(y=1-2\sqrt{2}\tan(100^\circ-2x)\\ĐKXĐ:\cos(100^\circ-2x)\ne 0\\\Leftrightarrow \cos(2x-100^\circ)\ne 0\\\Leftrightarrow 2x-100^\circ\ne 90^\circ+k180^\circ\\\Leftrightarrow 2x\ne 190^\circ+k180^\circ\\\Leftrightarrow x\ne 95^\circ+k90^\circ.(k\in\mathbb{Z})\\TXĐ:D=\mathbb{R}\backslash\{95^\circ+k90^\circ\Big|k\in\mathbb{Z}\}.\)
