El gráfico de la función cruce el eje X con f = 0
o sea hay que resolver la ecuación:
$$\cos{\left(x + \frac{\pi}{3} \right)} - 1 = 0$$
Resolvermos esta ecuaciónPuntos de cruce con el eje X:
Solución analítica$$x_{1} = - \frac{\pi}{3}$$
$$x_{2} = \frac{5 \pi}{3}$$
Solución numérica$$x_{1} = 68.067840622896$$
$$x_{2} = 74.3510259182365$$
$$x_{3} = 30.3687294917281$$
$$x_{4} = -38.7463090241633$$
$$x_{5} = -82.7286061805984$$
$$x_{6} = 42.9350992719286$$
$$x_{7} = -1.047197884948$$
$$x_{8} = 93.2005824445644$$
$$x_{9} = -57.5958648046158$$
$$x_{10} = -13.6135683222534$$
$$x_{11} = 11.5191718122226$$
$$x_{12} = -51.3126795018451$$
$$x_{13} = -63.8790510556062$$
$$x_{14} = -95.2949759363908$$
$$x_{15} = 5.23598813217661$$
$$x_{16} = -13.6135676562812$$
$$x_{17} = -95.2949766541678$$
$$x_{18} = -63.8790501935183$$
$$x_{19} = -26.1799386522404$$
$$x_{20} = -32.4631245795436$$
$$x_{21} = -101.578161953261$$
$$x_{22} = -45.0294942466274$$
$$x_{23} = 86.9173974067754$$
$$x_{24} = -7.33038307682589$$
$$x_{25} = 86.9173972167005$$
$$x_{26} = 61.7846556667327$$
$$x_{27} = -76.4454217322964$$
$$x_{28} = 42.9351000623883$$
$$x_{29} = 80.6342119540229$$
$$x_{30} = -51.3126788801149$$
$$x_{31} = 55.501469168008$$
$$x_{32} = -89.011792198443$$
$$x_{33} = -70.162235824498$$
$$x_{34} = -82.7286069811057$$
$$x_{35} = 61.784655497151$$
$$x_{36} = 49.21828448443$$
$$x_{37} = 17.8023578617743$$
$$x_{38} = -19.8967539141283$$
$$x_{39} = -1.04719709205516$$
$$x_{40} = -70.1622358120646$$
$$x_{41} = -89.0117914013259$$
$$x_{42} = 86.9173965904982$$
$$x_{43} = 11.5191725733813$$
$$x_{44} = 55.5014697264737$$
$$x_{45} = 99.4837668797295$$
$$x_{46} = 5.23598732913431$$
$$x_{47} = 68.0678403709668$$
$$x_{48} = 74.3510266393966$$
$$x_{49} = -63.8790503300893$$
$$x_{50} = -19.8967530533671$$
$$x_{51} = 86.9173964288891$$
$$x_{52} = 17.8023585073476$$
$$x_{53} = 99.483766182202$$
$$x_{54} = 80.6342122207782$$
$$x_{55} = -26.1799392876319$$
$$x_{56} = 17.8023583939831$$
$$x_{57} = 24.0855429847921$$
$$x_{58} = -51.3126802348481$$
$$x_{59} = -70.1622364367418$$
$$x_{60} = 80.6342112394353$$
$$x_{61} = 74.3510260714291$$
$$x_{62} = -45.029495041739$$
$$x_{63} = -38.7463098260451$$
$$x_{64} = 86.9173968009572$$
$$x_{65} = -7.33038184400076$$
$$x_{66} = 24.0855440859231$$
$$x_{67} = -13.6135682483753$$
$$x_{68} = 11.5191733313054$$
$$x_{69} = -26.1799387133702$$
$$x_{70} = -7.33038234970242$$
$$x_{71} = -76.4454209842472$$
$$x_{72} = 36.6519148022553$$
$$x_{73} = -19.8967525986102$$
$$x_{74} = -57.5958658923729$$
$$x_{75} = 49.2182852884197$$
$$x_{76} = 93.2005816398396$$
$$x_{77} = 30.3687289114122$$
$$x_{78} = 24.0855432280792$$
$$x_{79} = -76.4454224109362$$
$$x_{80} = 61.7846550114646$$
$$x_{81} = -57.5958654382348$$
$$x_{82} = 36.6519140812684$$
$$x_{83} = 30.368728796664$$
$$x_{84} = -32.4631238264292$$
$$x_{85} = 99.4837676465256$$
$$x_{86} = -32.4631253376294$$
$$x_{87} = -57.5958654079676$$
$$x_{88} = 36.6519151871741$$
$$x_{89} = -95.2949773927983$$
$$x_{90} = 42.935098044129$$
$$x_{91} = 68.0678412242824$$
$$x_{92} = 55.5014704889569$$