El gráfico de la función cruce el eje X con f = 0
o sea hay que resolver la ecuación:
$$\sqrt{2} \tan{\left(\sqrt{2} x \right)} = 0$$
Resolvermos esta ecuaciónPuntos de cruce con el eje X:
Solución analítica$$x_{1} = 0$$
Solución numérica$$x_{1} = 91.0791002322465$$
$$x_{2} = 11.1072073453959$$
$$x_{3} = -46.6502708506628$$
$$x_{4} = 17.7715317526335$$
$$x_{5} = 35.5430635052669$$
$$x_{6} = -13.3286488144751$$
$$x_{7} = 79.9718928868506$$
$$x_{8} = 37.7645049743461$$
$$x_{9} = 75.5290099486922$$
$$x_{10} = 2.22144146907918$$
$$x_{11} = -2.22144146907918$$
$$x_{12} = 6.66432440723755$$
$$x_{13} = -95.5219831704049$$
$$x_{14} = 48.871712319742$$
$$x_{15} = -79.9718928868506$$
$$x_{16} = 42.2073879125045$$
$$x_{17} = -53.3145952579004$$
$$x_{18} = -19.9929732217126$$
$$x_{19} = -84.414775825009$$
$$x_{20} = 93.3005417013257$$
$$x_{21} = -91.0791002322465$$
$$x_{22} = -42.2073879125045$$
$$x_{23} = -64.4218026032963$$
$$x_{24} = -86.6362172940881$$
$$x_{25} = 86.6362172940881$$
$$x_{26} = 66.6432440723755$$
$$x_{27} = -6.66432440723755$$
$$x_{28} = -48.871712319742$$
$$x_{29} = 77.7504514177714$$
$$x_{30} = -44.4288293815837$$
$$x_{31} = -35.5430635052669$$
$$x_{32} = -22.2144146907918$$
$$x_{33} = -93.3005417013257$$
$$x_{34} = 4.44288293815837$$
$$x_{35} = -77.7504514177714$$
$$x_{36} = -39.9859464434253$$
$$x_{37} = -17.7715317526335$$
$$x_{38} = -4.44288293815837$$
$$x_{39} = 71.0861270105339$$
$$x_{40} = 15.5500902835543$$
$$x_{41} = 46.6502708506628$$
$$x_{42} = 51.0931537888212$$
$$x_{43} = -15.5500902835543$$
$$x_{44} = -99.9648661085632$$
$$x_{45} = 73.307568479613$$
$$x_{46} = 0$$
$$x_{47} = -24.435856159871$$
$$x_{48} = -11.1072073453959$$
$$x_{49} = -26.6572976289502$$
$$x_{50} = 62.2003611342171$$
$$x_{51} = -71.0861270105339$$
$$x_{52} = 99.9648661085632$$
$$x_{53} = -75.5290099486922$$
$$x_{54} = 28.8787390980294$$
$$x_{55} = 39.9859464434253$$
$$x_{56} = 82.1933343559298$$
$$x_{57} = -31.1001805671086$$
$$x_{58} = -68.8646855414547$$
$$x_{59} = -73.307568479613$$
$$x_{60} = 33.3216220361877$$
$$x_{61} = 84.414775825009$$
$$x_{62} = 68.8646855414547$$
$$x_{63} = 44.4288293815837$$
$$x_{64} = -82.1933343559298$$
$$x_{65} = -88.8576587631673$$
$$x_{66} = -55.5360367269796$$
$$x_{67} = -62.2003611342171$$
$$x_{68} = 97.7434246394841$$
$$x_{69} = 95.5219831704049$$
$$x_{70} = 59.9789196651379$$
$$x_{71} = 53.3145952579004$$
$$x_{72} = 13.3286488144751$$
$$x_{73} = 88.8576587631673$$
$$x_{74} = 8.88576587631673$$
$$x_{75} = -28.8787390980294$$
$$x_{76} = 19.9929732217126$$
$$x_{77} = 55.5360367269796$$
$$x_{78} = -59.9789196651379$$
$$x_{79} = -66.6432440723755$$
$$x_{80} = -33.3216220361877$$
$$x_{81} = -97.7434246394841$$
$$x_{82} = 26.6572976289502$$
$$x_{83} = 22.2144146907918$$
$$x_{84} = 57.7574781960588$$
$$x_{85} = -57.7574781960588$$
$$x_{86} = -37.7645049743461$$
$$x_{87} = 64.4218026032963$$
$$x_{88} = -51.0931537888212$$
$$x_{89} = -8.88576587631673$$
$$x_{90} = 31.1001805671086$$
$$x_{91} = 24.435856159871$$