El gráfico de la función cruce el eje X con f = 0
o sea hay que resolver la ecuación:
$$\tan{\left(11 x \right)} + 2 = 0$$
Resolvermos esta ecuaciónPuntos de cruce con el eje X:
Solución analítica$$x_{1} = - \frac{\operatorname{atan}{\left(2 \right)}}{11}$$
Solución numérica$$x_{1} = 11.0377240702007$$
$$x_{2} = -14.3806164906622$$
$$x_{3} = -73.4996782445792$$
$$x_{4} = -56.6493176480521$$
$$x_{5} = 33.0288726453293$$
$$x_{6} = -73.7852775767237$$
$$x_{7} = 84.1511530991995$$
$$x_{8} = -26.9469871050213$$
$$x_{9} = -0.957447879869406$$
$$x_{10} = 78.1535671241645$$
$$x_{11} = -35.8005664015017$$
$$x_{12} = -79.7828635517588$$
$$x_{13} = -75.4988735695909$$
$$x_{14} = -100.06041613402$$
$$x_{15} = -17.8078084763965$$
$$x_{16} = -112.341187416235$$
$$x_{17} = 12.1801213987788$$
$$x_{18} = -93.7772308268406$$
$$x_{19} = 73.2983784777075$$
$$x_{20} = 71.0135838205513$$
$$x_{21} = 14.1793167237905$$
$$x_{22} = 16.7497107130912$$
$$x_{23} = 32.7432733131847$$
$$x_{24} = -48.6525363480054$$
$$x_{25} = 100.715914363582$$
$$x_{26} = -29.2317817621775$$
$$x_{27} = -42.0837517086812$$
$$x_{28} = 18.7489060381029$$
$$x_{29} = -14.9518151549512$$
$$x_{30} = -55.2213209873295$$
$$x_{31} = 8.18173074875545$$
$$x_{32} = -85.2092508625048$$
$$x_{33} = 91.5767357349572$$
$$x_{34} = -91.7780355018289$$
$$x_{35} = 23.3184953524154$$
$$x_{36} = -5975.98107567551$$
$$x_{37} = 98.4311197064259$$
$$x_{38} = -19.5214044692636$$
$$x_{39} = 118.423072956543$$
$$x_{40} = -37.2285630622243$$
$$x_{41} = 27.6024853345833$$
$$x_{42} = 30.4584786560285$$
$$x_{43} = -62.0757049587981$$
$$x_{44} = -71.214883587423$$
$$x_{45} = 50.7360312382899$$
$$x_{46} = 25.317690677427$$