El gráfico de la función cruce el eje X con f = 0
o sea hay que resolver la ecuación:
$$\cos{\left(x + \frac{\pi}{6} \right)} - 1 = 0$$
Resolvermos esta ecuaciónPuntos de cruce con el eje X:
Solución analítica$$x_{1} = - \frac{\pi}{6}$$
$$x_{2} = \frac{11 \pi}{6}$$
Solución numérica$$x_{1} = 87.4409958250878$$
$$x_{2} = -57.0722660751833$$
$$x_{3} = 81.1578093180369$$
$$x_{4} = -13.0899697075722$$
$$x_{5} = -13.0899698146708$$
$$x_{6} = 49.7418838493326$$
$$x_{7} = 49.7418835245054$$
$$x_{8} = 30.8923282331952$$
$$x_{9} = -44.5058967203222$$
$$x_{10} = 5.75958643339931$$
$$x_{11} = -57.0722668645673$$
$$x_{12} = -101.054563229573$$
$$x_{13} = -19.3731539653969$$
$$x_{14} = 62.3082547928689$$
$$x_{15} = 24.6091422617441$$
$$x_{16} = 37.1755134637125$$
$$x_{17} = 5.75958602210796$$
$$x_{18} = -38.2227111279653$$
$$x_{19} = 100.007365661841$$
$$x_{20} = -31.939525771185$$
$$x_{21} = 156.556034516879$$
$$x_{22} = 18.3259570967149$$
$$x_{23} = -6.80678449725847$$
$$x_{24} = -75.9218228126903$$
$$x_{25} = -82.2050076281063$$
$$x_{26} = -63.3554510011992$$
$$x_{27} = 93.7241810081872$$
$$x_{28} = 18.3259568926578$$
$$x_{29} = -13.0899689209265$$
$$x_{30} = 100.007366129962$$
$$x_{31} = -50.7890808483935$$
$$x_{32} = -50.7890816527148$$
$$x_{33} = -75.9218220581853$$
$$x_{34} = 12.0427717615073$$
$$x_{35} = -44.5058956472658$$
$$x_{36} = -69.6386373548543$$
$$x_{37} = 30.8923274298613$$
$$x_{38} = 68.5914401276649$$
$$x_{39} = 24.6091429668081$$
$$x_{40} = -19.373154896527$$
$$x_{41} = 43.4586978952293$$
$$x_{42} = -0.523598489731523$$
$$x_{43} = -69.638637223832$$
$$x_{44} = -38.2227106630569$$
$$x_{45} = -94.7713788080582$$
$$x_{46} = 5.75958726070503$$
$$x_{47} = -25.6563402322524$$
$$x_{48} = -88.4881942807791$$
$$x_{49} = -88.4881935647341$$
$$x_{50} = 49.7418831724391$$
$$x_{51} = -63.3554520547243$$
$$x_{52} = -6.80678369229017$$
$$x_{53} = -75.9218229143423$$
$$x_{54} = 56.0250690081558$$
$$x_{55} = 81.1578098139843$$
$$x_{56} = 93.7241806097162$$
$$x_{57} = -31.9395254617805$$
$$x_{58} = 68.5914394200902$$
$$x_{59} = -69.6386366485818$$
$$x_{60} = 18.3259576460966$$
$$x_{61} = -0.523599258250701$$
$$x_{62} = 301.069297155331$$
$$x_{63} = -44.5058964115732$$
$$x_{64} = 12.0427722166701$$
$$x_{65} = 56.0250685169442$$
$$x_{66} = -25.65633950106$$
$$x_{67} = 74.8746253871791$$
$$x_{68} = -57.0722665843695$$
$$x_{69} = 43.4586986677198$$
$$x_{70} = 56.0250689522333$$
$$x_{71} = 37.1755126583087$$
$$x_{72} = -94.7713780045959$$
$$x_{73} = -31.9395249202358$$
$$x_{74} = 24.6091430772094$$
$$x_{75} = -19.3731541846809$$
$$x_{76} = -82.2050077643523$$
$$x_{77} = -63.3554513363679$$
$$x_{78} = 81.1578106196128$$
$$x_{79} = 62.308254257502$$
$$x_{80} = 56.0250693524419$$
$$x_{81} = -82.2050082777704$$
$$x_{82} = -88.4881928048828$$
$$x_{83} = 74.8746246066628$$
$$x_{84} = 87.4409950488631$$
$$x_{85} = 62.3082540196632$$
$$x_{86} = -25.6563400637071$$
$$x_{87} = -264.417382419922$$
$$x_{88} = -38.2227104687978$$
$$x_{89} = 12.0427713725902$$
$$x_{90} = 30.8923274495049$$
$$x_{91} = 93.7241803230185$$
$$x_{92} = 5.75958669034246$$
$$x_{93} = 68.5914401180933$$