El gráfico de la función cruce el eje X con f = 0
o sea hay que resolver la ecuación:
$$\cos{\left(x - 2 \right)} = 0$$
Resolvermos esta ecuaciónPuntos de cruce con el eje X:
Solución analítica$$x_{1} = 2 + \frac{3 \pi}{2}$$
$$x_{2} = \frac{\pi}{2} + 2$$
Solución numérica$$x_{1} = 47.553093477052$$
$$x_{2} = 44.4115008234622$$
$$x_{3} = 0.429203673205103$$
$$x_{4} = 16.1371669411541$$
$$x_{5} = -5.85398163397448$$
$$x_{6} = 38.1283155162826$$
$$x_{7} = -43.553093477052$$
$$x_{8} = 82.1106126665397$$
$$x_{9} = 22.4203522483337$$
$$x_{10} = 91.5353906273091$$
$$x_{11} = -385.986692718339$$
$$x_{12} = -93.8185759344887$$
$$x_{13} = 60.1194640914112$$
$$x_{14} = 9.85398163397448$$
$$x_{15} = -8.99557428756428$$
$$x_{16} = 41.2699081698724$$
$$x_{17} = -52.9778714378214$$
$$x_{18} = -84.3937979737193$$
$$x_{19} = -40.4115008234622$$
$$x_{20} = 28.7035375555132$$
$$x_{21} = 6.71238898038469$$
$$x_{22} = -12.1371669411541$$
$$x_{23} = 94.6769832808989$$
$$x_{24} = 88.3937979737193$$
$$x_{25} = 25.5619449019235$$
$$x_{26} = -15.2787595947439$$
$$x_{27} = -37.2699081698724$$
$$x_{28} = -90.6769832808989$$
$$x_{29} = -62.4026493985908$$
$$x_{30} = -2.71238898038469$$
$$x_{31} = 75.8274273593601$$
$$x_{32} = -96.9601685880785$$
$$x_{33} = 34.9867228626928$$
$$x_{34} = -59.261056745001$$
$$x_{35} = 31.845130209103$$
$$x_{36} = -21.5619449019235$$
$$x_{37} = -166.075206967054$$
$$x_{38} = 56.9778714378214$$
$$x_{39} = 72.6858347057703$$
$$x_{40} = 19.2787595947439$$
$$x_{41} = -87.5353906273091$$
$$x_{42} = 69.5442420521806$$
$$x_{43} = 3.5707963267949$$
$$x_{44} = -30.9867228626928$$
$$x_{45} = -18.4203522483337$$
$$x_{46} = -2264.65909956504$$
$$x_{47} = 100.960168588078$$
$$x_{48} = 85.2522053201295$$
$$x_{49} = 63.261056745001$$
$$x_{50} = 12.9955742875643$$
$$x_{51} = -74.9690200129499$$
$$x_{52} = -34.1283155162826$$
$$x_{53} = -56.1194640914112$$
$$x_{54} = -78.1106126665397$$
$$x_{55} = -49.8362787842316$$
$$x_{56} = -46.6946861306418$$
$$x_{57} = -65.5442420521806$$
$$x_{58} = -24.7035375555132$$
$$x_{59} = 50.6946861306418$$
$$x_{60} = -68.6858347057703$$
$$x_{61} = -100.101761241668$$
$$x_{62} = -27.845130209103$$
$$x_{63} = 78.9690200129499$$
$$x_{64} = 53.8362787842316$$
$$x_{65} = 97.8185759344887$$
$$x_{66} = -71.8274273593601$$
$$x_{67} = -81.2522053201295$$
$$x_{68} = 66.4026493985908$$