El gráfico de la función cruce el eje X con f = 0
o sea hay que resolver la ecuación:
$$\frac{\sin{\left(x \right)} \sin^{3}{\left(x \right)}}{\frac{\sec{\left(x \right)}}{\sin{\left(x \right)}} \frac{1}{\sec{\left(x \right)} \sec{\left(x \right)}}} = 0$$
Resolvermos esta ecuaciónPuntos de cruce con el eje X:
Solución analítica$$x_{1} = 0$$
Solución numérica$$x_{1} = 28.2740733931504$$
$$x_{2} = 12.5631177479977$$
$$x_{3} = 21.9912591892659$$
$$x_{4} = -94.2448600131804$$
$$x_{5} = 81.685062627604$$
$$x_{6} = 0$$
$$x_{7} = 78.5368209072028$$
$$x_{8} = -97.393047813242$$
$$x_{9} = 100.528055949539$$
$$x_{10} = -9.42811599288212$$
$$x_{11} = 43.982518367658$$
$$x_{12} = 59.6938244100328$$
$$x_{13} = 34.5543518095393$$
$$x_{14} = -21.9912591891641$$
$$x_{15} = -59.6908993089238$$
$$x_{16} = -6.27989373408584$$
$$x_{17} = -72.2536174549252$$
$$x_{18} = -15.7084131244014$$
$$x_{19} = 6.2828301069505$$
$$x_{20} = -31.4193494162705$$
$$x_{21} = -37.6996562730754$$
$$x_{22} = -53.4105825253434$$
$$x_{23} = 87.965036557446$$
$$x_{24} = -65.9737774274733$$
$$x_{25} = 56.5455861948981$$
$$x_{26} = -43.9825183609724$$
$$x_{27} = 15.7113462449614$$
$$x_{28} = 65.9737775069718$$
$$x_{29} = -75.4018153232767$$
$$x_{30} = 94.2478033786741$$
$$x_{31} = -81.6821422012639$$
$$x_{32} = -28.2711343325319$$
$$x_{33} = 50.2653167107525$$
$$x_{34} = 72.2565600426178$$
$$x_{35} = -50.2623755671291$$
$$x_{36} = 37.7025856210041$$
$$x_{37} = -87.9650360833955$$