El gráfico de la función cruce el eje X con f = 0
o sea hay que resolver la ecuación:
$$\cos{\left(x - 1 \right)} = 0$$
Resolvermos esta ecuaciónPuntos de cruce con el eje X:
Solución analítica$$x_{1} = 1 + \frac{\pi}{2}$$
$$x_{2} = 1 + \frac{3 \pi}{2}$$
Solución numérica$$x_{1} = 59.1194640914112$$
$$x_{2} = -85.3937979737193$$
$$x_{3} = -72.8274273593601$$
$$x_{4} = -1285.48219164502$$
$$x_{5} = -66.5442420521806$$
$$x_{6} = -82.2522053201295$$
$$x_{7} = -44.553093477052$$
$$x_{8} = 5.71238898038469$$
$$x_{9} = -38.2699081698724$$
$$x_{10} = -16.2787595947439$$
$$x_{11} = -47.6946861306418$$
$$x_{12} = -13.1371669411541$$
$$x_{13} = -6.85398163397448$$
$$x_{14} = -69.6858347057703$$
$$x_{15} = 21.4203522483337$$
$$x_{16} = -9.99557428756428$$
$$x_{17} = 84.2522053201295$$
$$x_{18} = 49.6946861306418$$
$$x_{19} = -41.4115008234622$$
$$x_{20} = 90.5353906273091$$
$$x_{21} = 68.5442420521806$$
$$x_{22} = 46.553093477052$$
$$x_{23} = -22.5619449019235$$
$$x_{24} = 549.207918051419$$
$$x_{25} = -57.1194640914112$$
$$x_{26} = -63.4026493985908$$
$$x_{27} = -75.9690200129499$$
$$x_{28} = 33.9867228626928$$
$$x_{29} = 15.1371669411541$$
$$x_{30} = 77.9690200129499$$
$$x_{31} = -94.8185759344887$$
$$x_{32} = -19.4203522483337$$
$$x_{33} = 99.9601685880785$$
$$x_{34} = -25.7035375555132$$
$$x_{35} = 40.2699081698724$$
$$x_{36} = 37.1283155162826$$
$$x_{37} = 27.7035375555132$$
$$x_{38} = 8.85398163397448$$
$$x_{39} = 81.1106126665397$$
$$x_{40} = 18.2787595947439$$
$$x_{41} = 74.8274273593601$$
$$x_{42} = 55.9778714378214$$
$$x_{43} = 24.5619449019235$$
$$x_{44} = -88.5353906273091$$
$$x_{45} = 65.4026493985908$$
$$x_{46} = -50.8362787842316$$
$$x_{47} = 11.9955742875643$$
$$x_{48} = -28.845130209103$$
$$x_{49} = 2.5707963267949$$
$$x_{50} = -3.71238898038469$$
$$x_{51} = 43.4115008234622$$
$$x_{52} = -79.1106126665397$$
$$x_{53} = 71.6858347057703$$
$$x_{54} = -101.101761241668$$
$$x_{55} = -53.9778714378214$$
$$x_{56} = -91.6769832808989$$
$$x_{57} = 62.261056745001$$
$$x_{58} = -0.570796326794897$$
$$x_{59} = -35.1283155162826$$
$$x_{60} = 87.3937979737193$$
$$x_{61} = -31.9867228626928$$
$$x_{62} = 96.8185759344887$$
$$x_{63} = 30.845130209103$$
$$x_{64} = -97.9601685880785$$
$$x_{65} = 93.6769832808989$$
$$x_{66} = 52.8362787842316$$
$$x_{67} = -60.261056745001$$