El gráfico de la función cruce el eje X con f = 0
o sea hay que resolver la ecuación:
$$\frac{\tan{\left(x - \sin{\left(x \right)} \right)}}{x^{3}} = 0$$
Resolvermos esta ecuaciónPuntos de cruce con el eje X:
Solución numérica$$x_{1} = -25.1324728822804$$
$$x_{2} = 87.9641655984797$$
$$x_{3} = 81.6814921027211$$
$$x_{4} = -81.6814265200916$$
$$x_{5} = -18.8497315431443$$
$$x_{6} = 94.2482424975493$$
$$x_{7} = -75.3978986635068$$
$$x_{8} = 100.530898830812$$
$$x_{9} = 37.698778776622$$
$$x_{10} = -72.2566310325652$$
$$x_{11} = 50.265478406628$$
$$x_{12} = -87.9650396171259$$
$$x_{13} = -59.6902604182061$$
$$x_{14} = 62.8321017543193$$
$$x_{15} = 6.28231679061329$$
$$x_{16} = 18.8497846863839$$
$$x_{17} = 40.8407044966673$$
$$x_{18} = 87.9655385614538$$
$$x_{19} = 72.2566310325652$$
$$x_{20} = -47.1238898038469$$
$$x_{21} = -69.1151740462077$$
$$x_{22} = -37.6998697855723$$
$$x_{23} = 94.2470703587443$$
$$x_{24} = 87.9646063142811$$
$$x_{25} = 25.1325440344471$$
$$x_{26} = 12.5662940505807$$
$$x_{27} = -37.6986402500634$$
$$x_{28} = -81.6809652272225$$
$$x_{29} = 56.5489870792075$$
$$x_{30} = -25.132870171073$$
$$x_{31} = 50.2647170587874$$
$$x_{32} = 59.6902604182061$$
$$x_{33} = 69.1148519976598$$
$$x_{34} = -6.2834179250097$$
$$x_{35} = 84.8230016469244$$
$$x_{36} = 43.9823032502594$$
$$x_{37} = 75.3983636239366$$
$$x_{38} = -94.2481021348468$$
$$x_{39} = -53.4070751110265$$
$$x_{40} = 94.2477801894633$$
$$x_{41} = 31.4156680612568$$
$$x_{42} = -43.9814607813464$$
$$x_{43} = -21.9911485751286$$
$$x_{44} = 43.9818456517709$$
$$x_{45} = 69.1152316173255$$
$$x_{46} = -34.5575191894877$$
$$x_{47} = -3.14159265358979$$
$$x_{48} = 53.4070751110265$$
$$x_{49} = -43.9827197521296$$
$$x_{50} = -87.9638293276092$$
$$x_{51} = -69.114787001397$$
$$x_{52} = -87.9646059786093$$
$$x_{53} = -65.9734457253857$$
$$x_{54} = -62.8320415397184$$
$$x_{55} = -62.8316615858525$$
$$x_{56} = 6.28317660175695$$
$$x_{57} = -100.530835837348$$
$$x_{58} = 37.6991904940296$$
$$x_{59} = -78.5398163397448$$
$$x_{60} = -50.2654096337633$$
$$x_{61} = 28.2743338823081$$
$$x_{62} = 50.2659232646623$$
$$x_{63} = -37.6991249458949$$
$$x_{64} = -81.6822506349978$$
$$x_{65} = -91.106186954104$$
$$x_{66} = 43.9831424136765$$
$$x_{67} = 81.6810918891131$$
$$x_{68} = -9.42477796076938$$
$$x_{69} = 65.9734457253857$$
$$x_{70} = -15.707963267949$$
$$x_{71} = 97.3893722612836$$
$$x_{72} = 12.5666463634001$$
$$x_{73} = -43.9823032307113$$
$$x_{74} = -56.5485340216575$$
$$x_{75} = -12.5665850466909$$
$$x_{76} = 15.707963267949$$
$$x_{77} = 9.42477796076938$$
$$x_{78} = -75.3983037256206$$
$$x_{79} = 18.8494179092913$$
$$x_{80} = -12.5662238749128$$
$$x_{81} = 62.8317238048662$$
$$x_{82} = -50.2657931848479$$
$$x_{83} = -31.4155814144572$$
$$x_{84} = -6.28310204194151$$
$$x_{85} = 21.9911485751286$$
$$x_{86} = 34.5575191894877$$
$$x_{87} = 25.1329242034183$$
$$x_{88} = -97.3893722612836$$
$$x_{89} = -18.8493494721619$$
$$x_{90} = -94.2477111785437$$
$$x_{91} = 31.4160604351946$$
$$x_{92} = -31.4160021310103$$
$$x_{93} = 6.28350330747282$$
$$x_{94} = -28.2743338823081$$
$$x_{95} = 78.5398163397448$$
$$x_{96} = 56.5485975957041$$
$$x_{97} = -56.5489107656825$$
$$x_{98} = 75.3979781349956$$