El gráfico de la función cruce el eje T con f = 0
o sea hay que resolver la ecuación:
$$\sin^{2}{\left(\frac{t}{2} \right)} = 0$$
Resolvermos esta ecuaciónPuntos de cruce con el eje T:
Solución analítica$$t_{1} = 0$$
$$t_{2} = 2 \pi$$
Solución numérica$$t_{1} = 94.2477796093523$$
$$t_{2} = -81.6814084945807$$
$$t_{3} = -100.530964626003$$
$$t_{4} = -50.2654829667315$$
$$t_{5} = -37.6991121287155$$
$$t_{6} = 62.8318535568358$$
$$t_{7} = -25.1327415297174$$
$$t_{8} = 0$$
$$t_{9} = 18.8495564031971$$
$$t_{10} = 6.28318579821791$$
$$t_{11} = 43.9822966661001$$
$$t_{12} = -43.9822976246252$$
$$t_{13} = 75.3982232188727$$
$$t_{14} = 100.530965157364$$
$$t_{15} = -75.3982231720141$$
$$t_{16} = -12.5663710889626$$
$$t_{17} = 69.115038794053$$
$$t_{18} = -81.6814092565354$$
$$t_{19} = 81.6814091897036$$
$$t_{20} = -75.3982231045728$$
$$t_{21} = -56.5486682426592$$
$$t_{22} = -6.28318555849548$$
$$t_{23} = 87.9645938121814$$
$$t_{24} = -56.5486674685864$$
$$t_{25} = 43.9822974733639$$
$$t_{26} = 50.2654829439723$$
$$t_{27} = 56.5486680806249$$
$$t_{28} = -87.9645947692094$$
$$t_{29} = -43.9822967932182$$
$$t_{30} = 56.5486682809363$$
$$t_{31} = 50.2654821322586$$
$$t_{32} = 18.8495556275525$$
$$t_{33} = -6.2831851275477$$
$$t_{34} = -81.6814090382277$$
$$t_{35} = -87.9645943586158$$
$$t_{36} = 94.2477800892631$$
$$t_{37} = 56.5486668532011$$
$$t_{38} = -50.2654822863493$$
$$t_{39} = 25.1327416384075$$
$$t_{40} = -37.6991113479743$$
$$t_{41} = -31.4159260208155$$
$$t_{42} = 100.530964759815$$
$$t_{43} = -69.1150379045123$$
$$t_{44} = 81.6814085860518$$
$$t_{45} = 87.9645946044253$$
$$t_{46} = -6.2831858160515$$
$$t_{47} = -18.8495555173448$$
$$t_{48} = 6.28318528420851$$
$$t_{49} = 12.5663704426592$$
$$t_{50} = 12.5663711301703$$
$$t_{51} = -18.8495552124105$$
$$t_{52} = -94.2477797298079$$
$$t_{53} = -81.6814075578313$$
$$t_{54} = -31.4159267157965$$
$$t_{55} = 6.28318626747926$$
$$t_{56} = -43.9822971745392$$
$$t_{57} = 43.9822971694647$$
$$t_{58} = 37.6991115173992$$
$$t_{59} = 75.3982240031607$$
$$t_{60} = 81.6814084860076$$
$$t_{61} = -87.964593928489$$
$$t_{62} = 10851.0610239173$$
$$t_{63} = 62.8318527849002$$
$$t_{64} = 31.4159260648825$$
$$t_{65} = -94.2477801171671$$
$$t_{66} = -12.5663703112531$$
$$t_{67} = -94.2477794452815$$
$$t_{68} = -18.8495563230046$$
$$t_{69} = -75.3982238741744$$
$$t_{70} = 25.1327408328211$$
$$t_{71} = -81.6814107940317$$
$$t_{72} = -37.6991118772631$$
$$t_{73} = 69.1150379887504$$
$$t_{74} = -25.1327407505866$$
$$t_{75} = -31.4159260507536$$
$$t_{76} = 56.5486676011951$$
$$t_{77} = -69.1150386869085$$
$$t_{78} = 12.5663710110881$$
$$t_{79} = 37.6991120311338$$
$$t_{80} = -62.831852673202$$
$$t_{81} = 94.2477792651059$$
$$t_{82} = 50.2654824463392$$
$$t_{83} = 31.4159268459961$$
$$t_{84} = -50.265482641087$$
$$t_{85} = -62.8318534787248$$
$$t_{86} = 87.964594335905$$
$$t_{87} = 6.28318500093652$$
$$t_{88} = 37.6991113348642$$