El gráfico de la función cruce el eje X con f = 0
o sea hay que resolver la ecuación:
$$\sin^{4}{\left(5 x - 3 \right)} = 0$$
Resolvermos esta ecuaciónPuntos de cruce con el eje X:
Solución analítica$$x_{1} = \frac{3}{5}$$
$$x_{2} = \frac{3}{5} + \frac{\pi}{5}$$
Solución numérica$$x_{1} = -22.019398957176$$
$$x_{2} = 32.0158705444194$$
$$x_{3} = 54.0070502378078$$
$$x_{4} = 82.2813193637331$$
$$x_{5} = -83.5947104020847$$
$$x_{6} = -87.992937746829$$
$$x_{7} = 6.25485276020843$$
$$x_{8} = 94.2195488958524$$
$$x_{9} = 50.2372008720801$$
$$x_{10} = -59.7186686121975$$
$$x_{11} = -81.7098416183491$$
$$x_{12} = -15.7363212550971$$
$$x_{13} = 72.228374874223$$
$$x_{14} = -3.79809017379966$$
$$x_{15} = 60.2901463567536$$
$$x_{16} = -96.1611806723998$$
$$x_{17} = 80.3962913476409$$
$$x_{18} = -54.0635061648797$$
$$x_{19} = 87.9364818080785$$
$$x_{20} = -66.0017580525797$$
$$x_{21} = 86.0511306408541$$
$$x_{22} = -91.7627871048408$$
$$x_{23} = 16.3078027207527$$
$$x_{24} = -61.6036964721311$$
$$x_{25} = -44.0105783926978$$
$$x_{26} = 125.007141018751$$
$$x_{27} = 40.1842628409673$$
$$x_{28} = 18.1930855002719$$
$$x_{29} = -69.771613102662$$
$$x_{30} = -47.7804390811453$$
$$x_{31} = -25.7892648734422$$
$$x_{32} = 89.1929435519025$$
$$x_{33} = 21.9629579395522$$
$$x_{34} = -0.0282200506212569$$
$$x_{35} = -5.68336740846006$$
$$x_{36} = 75.9982299320748$$
$$x_{37} = 58.4052772830535$$
$$x_{38} = -52.8070552766019$$
$$x_{39} = -27.6745360079691$$
$$x_{40} = 10.0246906763949$$
$$x_{41} = 28.2460268281358$$
$$x_{42} = -98.0458534100521$$
$$x_{43} = 23.8478716936823$$
$$x_{44} = 39.5557643162875$$
$$x_{45} = 45.8388068577099$$
$$x_{46} = -76.0546786176597$$
$$x_{47} = 38.2989740647238$$
$$x_{48} = -33.9576719480227$$
$$x_{49} = 1.85682667975618$$
$$x_{50} = -11.9664898421347$$
$$x_{51} = 65.9453093588324$$
$$x_{52} = -37.7274950972757$$
$$x_{53} = 43.9541345692837$$
$$x_{54} = -55.9488573550172$$
$$x_{55} = 97.9894095918104$$