Phương trình $\dfrac{{\cos 2x}}{{1 - \sin 2x}} = 0$ có nghiệm là:

$\left[ \begin{array}{l}x = \dfrac{\pi }{3} + k\pi \\x = \dfrac{\pi }{6} + k\pi \end{array} \right.\,\,\left( {k \in Z} \right)$

$\left[ \begin{array}{l}x = \dfrac{\pi }{3} + k2\pi \\x = \dfrac{\pi }{6} + k2\pi \end{array} \right.\,\,\left( {k \in Z} \right)$

$\left[ \begin{array}{l}x =  - \dfrac{\pi }{3} + k\pi \\x =  - \dfrac{\pi }{6} + k\pi \end{array} \right.\,\,\left( {k \in Z} \right)$

$\left[ \begin{array}{l}x =  - \dfrac{\pi }{3} + k2\pi \\x = \dfrac{\pi }{6} + k\pi \end{array} \right.\,\,\left( {k \in Z} \right)$

$x = \dfrac{\pi }{8} + k\pi \left( {k \in Z} \right)$

$x = \dfrac{\pi }{8} + \dfrac{{k\pi }}{5}\left( {k \in Z} \right)$      

$x = \dfrac{\pi }{8} + \dfrac{{k\pi }}{4}\left( {k \in Z} \right)$

$x = \dfrac{\pi }{8} + \dfrac{{k\pi }}{2}\left( {k \in Z} \right)$

$1$     

$0$      

$3$

$2$

$O\left( {0;0} \right)$

$M\left( {0;1} \right)$

$N\left( {\dfrac{\pi }{2};0} \right)$

$P\left( {1;0} \right)$

$m = 1$

Không có m

$m = 0$

Với mọi m

$- \dfrac{{5{\pi ^2}}}{{12}}$           

$- \dfrac{{5{\pi ^2}}}{{144}}$

$\dfrac{{5{\pi ^2}}}{{144}}$

$\dfrac{{{\pi ^2}}}{{12}}$ 

$D = \mathbb{R}\backslash \left\{ { - \dfrac{\pi }{8} + k\dfrac{\pi }{4},k \in \mathbb{Z}} \right\}$

$D = \mathbb{R}\backslash \left\{ { - \dfrac{{3\pi }}{8} + k\dfrac{\pi }{2},k \in \mathbb{Z}} \right\}$ 

$D = \mathbb{R}\backslash \left\{ { - \dfrac{\pi }{8} + k\dfrac{\pi }{2},k \in \mathbb{Z}} \right\}$

$D = \mathbb{R}\backslash \left\{ {\dfrac{{k2\pi }}{3},k \in \mathbb{Z}} \right\}$