El gráfico de la función cruce el eje X con f = 0
o sea hay que resolver la ecuación:
$$\tan{\left(x + 2 \right)} = 0$$
Resolvermos esta ecuaciónPuntos de cruce con el eje X:
Solución analítica$$x_{1} = -2$$
Solución numérica$$x_{1} = 63.9734457253857$$
$$x_{2} = 16.8495559215388$$
$$x_{3} = 76.5398163397448$$
$$x_{4} = -93.106186954104$$
$$x_{5} = -27.1327412287183$$
$$x_{6} = 29.4159265358979$$
$$x_{7} = -71.1150383789755$$
$$x_{8} = 4.28318530717959$$
$$x_{9} = 13.707963267949$$
$$x_{10} = 70.2566310325652$$
$$x_{11} = 45.1238898038469$$
$$x_{12} = 95.3893722612836$$
$$x_{13} = -33.4159265358979$$
$$x_{14} = -23.9911485751286$$
$$x_{15} = -30.2743338823081$$
$$x_{16} = -61.6902604182061$$
$$x_{17} = -42.8407044966673$$
$$x_{18} = 92.2477796076938$$
$$x_{19} = 26.2743338823081$$
$$x_{20} = -45.9822971502571$$
$$x_{21} = -89.9645943005142$$
$$x_{22} = -8.28318530717959$$
$$x_{23} = -96.2477796076938$$
$$x_{24} = 60.8318530717959$$
$$x_{25} = 23.1327412287183$$
$$x_{26} = 1.14159265358979$$
$$x_{27} = -11.4247779607694$$
$$x_{28} = 48.2654824574367$$
$$x_{29} = -99.3893722612836$$
$$x_{30} = -67.9734457253857$$
$$x_{31} = 89.106186954104$$
$$x_{32} = 51.4070751110265$$
$$x_{33} = 38.8407044966673$$
$$x_{34} = 82.8230016469244$$
$$x_{35} = -39.6991118430775$$
$$x_{36} = -80.5398163397448$$
$$x_{37} = 7.42477796076938$$
$$x_{38} = -58.5486677646163$$
$$x_{39} = 41.9822971502571$$
$$x_{40} = 57.6902604182061$$
$$x_{41} = -49.1238898038469$$
$$x_{42} = -5.14159265358979$$
$$x_{43} = -86.8230016469244$$
$$x_{44} = -83.6814089933346$$
$$x_{45} = 32.5575191894877$$
$$x_{46} = 19.9911485751286$$
$$x_{47} = -55.4070751110265$$
$$x_{48} = 10.5663706143592$$
$$x_{49} = 35.6991118430775$$
$$x_{50} = -14.5663706143592$$
$$x_{51} = 79.6814089933346$$
$$x_{52} = 67.1150383789755$$
$$x_{53} = 101.672557568463$$
$$x_{54} = -77.398223686155$$
$$x_{55} = -17.707963267949$$
$$x_{56} = -64.8318530717959$$
$$x_{57} = 85.9645943005142$$
$$x_{58} = 54.5486677646163$$
$$x_{59} = 73.398223686155$$
$$x_{60} = -52.2654824574367$$
$$x_{61} = -20.8495559215388$$
$$x_{62} = -74.2566310325652$$
$$x_{63} = -36.5575191894877$$
$$x_{64} = -2$$
$$x_{65} = 98.5309649148734$$