El gráfico de la función cruce el eje X con f = 0
o sea hay que resolver la ecuación:
$$\sin{\left(\frac{x - \pi}{4} \right)} = 0$$
Resolvermos esta ecuaciónPuntos de cruce con el eje X:
Solución analítica$$x_{1} = \pi$$
$$x_{2} = 5 \pi$$
Solución numérica$$x_{1} = 3.14159265358979$$
$$x_{2} = -47.1238898038469$$
$$x_{3} = -34.5575191894877$$
$$x_{4} = 141.371669411541$$
$$x_{5} = 91.106186954104$$
$$x_{6} = -109.955742875643$$
$$x_{7} = 10709.6893560876$$
$$x_{8} = -386.415896391545$$
$$x_{9} = -9.42477796076938$$
$$x_{10} = 65.9734457253857$$
$$x_{11} = 78.5398163397448$$
$$x_{12} = 53.4070751110265$$
$$x_{13} = 28.2743338823081$$
$$x_{14} = 179.070781254618$$
$$x_{15} = -59.6902604182061$$
$$x_{16} = -21.9911485751286$$
$$x_{17} = 15.707963267949$$
$$x_{18} = 103.672557568463$$
$$x_{19} = -72.2566310325652$$
$$x_{20} = -84.8230016469244$$
$$x_{21} = -97.3893722612836$$
$$x_{22} = 40.8407044966673$$