El gráfico de la función cruce el eje X con f = 0
o sea hay que resolver la ecuación:
$$\tan{\left(\frac{13 x}{10} \right)} = 0$$
Resolvermos esta ecuaciónPuntos de cruce con el eje X:
Solución analítica$$x_{1} = 0$$
Solución numérica$$x_{1} = -26.5827070688367$$
$$x_{2} = -31.4159265358979$$
$$x_{3} = -4.83321946706122$$
$$x_{4} = -53.1654141376734$$
$$x_{5} = -7.24982920059183$$
$$x_{6} = 77.3315114729795$$
$$x_{7} = -84.5813406735714$$
$$x_{8} = -55.582023871204$$
$$x_{9} = 55.582023871204$$
$$x_{10} = -19.3328778682449$$
$$x_{11} = 9.66643893412244$$
$$x_{12} = -96.6643893412244$$
$$x_{13} = 38.6657557364898$$
$$x_{14} = -86.997950407102$$
$$x_{15} = -16.9162681347143$$
$$x_{16} = 45.9155849370816$$
$$x_{17} = 12.0830486676531$$
$$x_{18} = -50.7488044041428$$
$$x_{19} = 48.3321946706122$$
$$x_{20} = -62.8318530717959$$
$$x_{21} = 2.41660973353061$$
$$x_{22} = -67.6650725388571$$
$$x_{23} = 36.2491460029592$$
$$x_{24} = 33.8325362694285$$
$$x_{25} = 86.997950407102$$
$$x_{26} = -48.3321946706122$$
$$x_{27} = 94.2477796076938$$
$$x_{28} = 31.4159265358979$$
$$x_{29} = -65.2484628053265$$
$$x_{30} = 82.1647309400407$$
$$x_{31} = -38.6657557364898$$
$$x_{32} = 60.4152433382653$$
$$x_{33} = 53.1654141376734$$
$$x_{34} = -72.4982920059183$$
$$x_{35} = 0$$
$$x_{36} = -99.080999074755$$
$$x_{37} = 50.7488044041428$$
$$x_{38} = -45.9155849370816$$
$$x_{39} = 79.7481212065101$$
$$x_{40} = -14.4996584011837$$
$$x_{41} = 26.5827070688367$$
$$x_{42} = -24.1660973353061$$
$$x_{43} = -79.7481212065101$$
$$x_{44} = 96.6643893412244$$
$$x_{45} = -33.8325362694285$$
$$x_{46} = -70.0816822723877$$
$$x_{47} = 70.0816822723877$$
$$x_{48} = -41.0823654700204$$
$$x_{49} = -89.4145601406326$$
$$x_{50} = 89.4145601406326$$
$$x_{51} = -91.8311698741632$$
$$x_{52} = -9.66643893412244$$
$$x_{53} = 16.9162681347143$$
$$x_{54} = 99.080999074755$$
$$x_{55} = 74.9149017394489$$
$$x_{56} = 91.8311698741632$$
$$x_{57} = -60.4152433382653$$
$$x_{58} = -43.498975203551$$
$$x_{59} = 4.83321946706122$$
$$x_{60} = 67.6650725388571$$
$$x_{61} = 28.9993168023673$$
$$x_{62} = -28.9993168023673$$
$$x_{63} = 14.4996584011837$$
$$x_{64} = -57.9986336047346$$
$$x_{65} = 72.4982920059183$$
$$x_{66} = -77.3315114729795$$
$$x_{67} = 57.9986336047346$$
$$x_{68} = 41.0823654700204$$
$$x_{69} = 19.3328778682449$$
$$x_{70} = 7.24982920059183$$
$$x_{71} = -12.0830486676531$$
$$x_{72} = 62.8318530717959$$
$$x_{73} = -2.41660973353061$$
$$x_{74} = -74.9149017394489$$
$$x_{75} = -94.2477796076938$$
$$x_{76} = -21.7494876017755$$
$$x_{77} = 21.7494876017755$$
$$x_{78} = 84.5813406735714$$
$$x_{79} = -36.2491460029592$$
$$x_{80} = 43.498975203551$$
$$x_{81} = 24.1660973353061$$
$$x_{82} = -82.1647309400407$$
$$x_{83} = 65.2484628053265$$