El gráfico de la función cruce el eje X con f = 0
o sea hay que resolver la ecuación:
$$\tan{\left(x + \frac{\pi}{4} \right)} - 2 = 0$$
Resolvermos esta ecuaciónPuntos de cruce con el eje X:
Solución analítica$$x_{1} = - \frac{\pi}{4} + \operatorname{atan}{\left(2 \right)}$$
Solución numérica$$x_{1} = 53.7288256654231$$
$$x_{2} = 31.7376770902946$$
$$x_{3} = 66.2951962797823$$
$$x_{4} = -37.3773612886809$$
$$x_{5} = -75.0764731317584$$
$$x_{6} = -31.0941759815013$$
$$x_{7} = -97.067621706887$$
$$x_{8} = -56.2269172102196$$
$$x_{9} = -15.3862127135523$$
$$x_{10} = 41.162455051064$$
$$x_{11} = 50.5872330118333$$
$$x_{12} = -65.651695170989$$
$$x_{13} = 25.454491783115$$
$$x_{14} = 9.74652851516602$$
$$x_{15} = -34.2357686350911$$
$$x_{16} = -78.2180657853482$$
$$x_{17} = 6.60493586157623$$
$$x_{18} = 16.0297138223456$$
$$x_{19} = 0.321750554396642$$
$$x_{20} = 88.2863448549109$$
$$x_{21} = 82.0031595477313$$
$$x_{22} = -49.9437319030401$$
$$x_{23} = -5.96143475278294$$
$$x_{24} = 44.3040477046537$$
$$x_{25} = 22.3128991295252$$
$$x_{26} = -59.3685098638094$$
$$x_{27} = 38.0208623974742$$
$$x_{28} = -81.359658438938$$
$$x_{29} = -43.6605465958605$$
$$x_{30} = -93.9260290532972$$
$$x_{31} = -87.6428437461176$$
$$x_{32} = 75.7199742405517$$
$$x_{33} = 60.0120109726027$$
$$x_{34} = 97.7111228156802$$
$$x_{35} = 28.5960844367048$$
$$x_{36} = -100.209214360477$$
$$x_{37} = -71.9348804781686$$
$$x_{38} = -21.6693980207319$$
$$x_{39} = -12.2446200599625$$
$$x_{40} = -18.5278053671421$$
$$x_{41} = 94.5695301620904$$
$$x_{42} = 72.5783815869619$$
$$x_{43} = -53.0853245566298$$
$$x_{44} = -27.9525833279115$$
$$x_{45} = -700.253411196127$$
$$x_{46} = -84.5012510925278$$
$$x_{47} = 12.8881211687558$$