El gráfico de la función cruce el eje X con f = 0
o sea hay que resolver la ecuación:
$$2 - 3 \cos{\left(x - 1 \right)} = 0$$
Resolvermos esta ecuaciónPuntos de cruce con el eje X:
Solución analítica$$x_{1} = \operatorname{acos}{\left(\frac{2}{3} \right)} + 1$$
$$x_{2} = - \operatorname{acos}{\left(\frac{2}{3} \right)} + 1 + 2 \pi$$
Solución numérica$$x_{1} = 96.0888482782617$$
$$x_{2} = 58.3897364351842$$
$$x_{3} = -94.0888482782617$$
$$x_{4} = 83.5224776639025$$
$$x_{5} = 26.9738098992863$$
$$x_{6} = 1993.6108110465$$
$$x_{7} = 56.7075990940483$$
$$x_{8} = 100.689896244305$$
$$x_{9} = 44.1412284796892$$
$$x_{10} = -87.8056629710821$$
$$x_{11} = 25.2916725581504$$
$$x_{12} = 0.15893132943207$$
$$x_{13} = 6.44211663661166$$
$$x_{14} = -86.1235256299463$$
$$x_{15} = -42.1412284796892$$
$$x_{16} = -35.8580431725096$$
$$x_{17} = -7016.47691944903$$
$$x_{18} = 52.1065511280046$$
$$x_{19} = -431.698717524824$$
$$x_{20} = 69.2739697084075$$
$$x_{21} = -43.823365820825$$
$$x_{22} = 39.5401805136454$$
$$x_{23} = -81.5224776639025$$
$$x_{24} = -56.3897364351842$$
$$x_{25} = 70.9561070495434$$
$$x_{26} = -31.2569952064659$$
$$x_{27} = -29.57485786533$$
$$x_{28} = -79.8403403227667$$
$$x_{29} = -295.150778108008$$
$$x_{30} = 50.4244137868688$$
$$x_{31} = 31.57485786533$$
$$x_{32} = -92.4067109371259$$
$$x_{33} = -12.4074392849271$$
$$x_{34} = 89.8056629710821$$
$$x_{35} = 37.8580431725096$$
$$x_{36} = 62.9907844012279$$
$$x_{37} = -54.7075990940483$$
$$x_{38} = -37.5401805136454$$
$$x_{39} = -67.2739697084075$$
$$x_{40} = 8.12425397774752$$
$$x_{41} = 45.823365820825$$
$$x_{42} = 94.4067109371259$$
$$x_{43} = -73.5571550155871$$
$$x_{44} = 14.4074392849271$$
$$x_{45} = -60.9907844012279$$
$$x_{46} = 75.5571550155871$$
$$x_{47} = -68.9561070495434$$
$$x_{48} = -10.7253019437912$$
$$x_{49} = 64.6729217423638$$
$$x_{50} = -17.0084872509708$$
$$x_{51} = -6.12425397774752$$
$$x_{52} = -24.9738098992863$$
$$x_{53} = -75.239292356723$$
$$x_{54} = 12.7253019437912$$
$$x_{55} = -98.6898962443055$$
$$x_{56} = 33.2569952064659$$
$$x_{57} = 20.6906245921067$$
$$x_{58} = 81.8403403227667$$
$$x_{59} = 259.451666264931$$
$$x_{60} = -50.1065511280046$$
$$x_{61} = -23.2916725581504$$
$$x_{62} = -4.44211663661166$$
$$x_{63} = 88.1235256299463$$
$$x_{64} = 77.239292356723$$
$$x_{65} = 19.0084872509708$$
$$x_{66} = -62.6729217423638$$
$$x_{67} = -5679.84058636091$$
$$x_{68} = 1.84106867056793$$
$$x_{69} = -18.6906245921067$$
$$x_{70} = -100.372033585441$$
$$x_{71} = -48.4244137868688$$
$$x_{72} = 414.849161603285$$