El gráfico de la función cruce el eje X con f = 0
o sea hay que resolver la ecuación:
$$- \sin{\left(0.5 \left(x - \frac{3}{\pi}\right) \right)} = 0$$
Resolvermos esta ecuaciónPuntos de cruce con el eje X:
Solución analítica$$x_{1} = 0.954929658551372$$
$$x_{2} = 7.23811496573096$$
Solución numérica$$x_{1} = 32.3708561944493$$
$$x_{2} = 57.5035974231676$$
$$x_{3} = 95.2027092662452$$
$$x_{4} = -420.018485922481$$
$$x_{5} = -36.7441821845261$$
$$x_{6} = 70.0699680375268$$
$$x_{7} = 88.9195239590656$$
$$x_{8} = 51.2204121159881$$
$$x_{9} = 16569.7145846911$$
$$x_{10} = 44.9372268088085$$
$$x_{11} = 38.6540415016289$$
$$x_{12} = -87.0096646419628$$
$$x_{13} = 63.7867827303472$$
$$x_{14} = 145.468191723682$$
$$x_{15} = 19.8044855800901$$
$$x_{16} = -501.699894915816$$
$$x_{17} = 82.636338651886$$
$$x_{18} = -55.5937381060649$$
$$x_{19} = 101.485894573425$$
$$x_{20} = -17.8946262629874$$
$$x_{21} = 189.450488873939$$
$$x_{22} = 13.5213002729105$$
$$x_{23} = -99.576035256322$$
$$x_{24} = -68.1601087204241$$
$$x_{25} = -24.177811570167$$
$$x_{26} = -49.3105527988853$$
$$x_{27} = -43.0273674917057$$
$$x_{28} = 0.954929658551372$$
$$x_{29} = 76.3531533447064$$
$$x_{30} = 1232.45924986575$$
$$x_{31} = -80.7264793347832$$
$$x_{32} = -250.372482628632$$
$$x_{33} = -61.8769234132445$$
$$x_{34} = 7.23811496573096$$
$$x_{35} = -74.4432940276037$$
$$x_{36} = -5.32825564862821$$
$$x_{37} = 26.0876708872697$$
$$x_{38} = -137.2751470994$$
$$x_{39} = -93.2928499491424$$
$$x_{40} = -11.6114409558078$$
$$x_{41} = -30.4609968773466$$