Помогите решить неравенство
Спасибо

Замена $x=6t$

$frac{sint}{cos2t*cos3t} textgreater 0 left { {{ sint textgreater 0} atop { cos2t textgreater 0 , cos3t textgreater 0}} right. left { {{ sint textgreater 0} atop { cos2t textless 0 , cos3t textless 0}} right. left { {{ sint textless 0} atop { cos2t textless 0 , cos3t textgreater 0}} right. left { {{ sint textless 0} atop { cos2t textgreater 0 , cos3t textless 0}} right.$

   $t in (2pi*n-pi ; frac{12pi*n-5pi}{6} ) t in (2pi*n- frac{3pi}{4} ; frac{4pi*n-pi}{2} ) t in (2pi*n- frac{pi}{4} ; frac{12pi*n-pi}{6} ) t in (2pi*n; frac{12pi*n+pi}{6} ) t in (2pi*n + frac{pi}{4} ; frac{4pi*n+pi}{2} ) t in (2pi*n + frac{3pi}{4} ; frac{12pi*n+5pi}{6} )$
осталось заменить и поделить на $6$