Помогите решить неравенство Спасибо

       Замена  [latex] x=6t[/latex]            [latex] \frac{sint}{cos2t*cos3t} \ \textgreater \ 0 \\ \left \{ {{ sint \ \textgreater \ 0} \atop { cos2t \ \textgreater \ 0 , cos3t\ \textgreater \ 0}} \right.\\ \left \{ {{ sint \ \textgreater \ 0} \atop { cos2t \ \textless \ 0 , cos3t\ \textless \ 0}} \right.\\ \left \{ {{ sint \ \textless \ 0} \atop { cos2t \ \textless \ 0 , cos3t\ \textgreater \ 0}} \right. \\ \left \{ {{ sint \ \textless \ 0} \atop { cos2t \ \textgreater \ 0 , cos3t\ \textless \ 0}} \right. [/latex]         [latex] t \in (2\pi*n-\pi ; \frac{12\pi*n-5\pi}{6} ) \\ t \in (2\pi*n- \frac{3\pi}{4} ; \frac{4\pi*n-\pi}{2} ) \\ t \in (2\pi*n- \frac{\pi}{4} ; \frac{12\pi*n-\pi}{6} ) \\ t \in (2\pi*n; \frac{12\pi*n+\pi}{6} ) \\ t \in (2\pi*n + \frac{\pi}{4} ; \frac{4\pi*n+\pi}{2} ) \\ t \in (2\pi*n + \frac{3\pi}{4} ; \frac{12\pi*n+5\pi}{6} ) \\[/latex]  осталось заменить и поделить  на      [latex]6[/latex]