El gráfico de la función cruce el eje X con f = 0
o sea hay que resolver la ecuación:
$$2 \sin{\left(x \right)} + 3 \cos{\left(x \right)} = 0$$
Resolvermos esta ecuaciónPuntos de cruce con el eje X:
Solución analítica$$x_{1} = - \operatorname{atan}{\left(\frac{3}{2} \right)}$$
Solución numérica$$x_{1} = 36.7163181198302$$
$$x_{2} = -85.8057953701718$$
$$x_{3} = -98.3721659845309$$
$$x_{4} = 46.1410960805996$$
$$x_{5} = -19.8323496447861$$
$$x_{6} = 5.30039158393226$$
$$x_{7} = 39.85791077342$$
$$x_{8} = -26.1155349519657$$
$$x_{9} = 49.2826887341894$$
$$x_{10} = 74.4154299629077$$
$$x_{11} = 96.4065785380363$$
$$x_{12} = -70.0978321022228$$
$$x_{13} = 42.9995034270098$$
$$x_{14} = 64.9906520021383$$
$$x_{15} = 52.4242813877792$$
$$x_{16} = 61.8490593485485$$
$$x_{17} = -44.9650908735044$$
$$x_{18} = -95.2305733309411$$
$$x_{19} = -79.5226100629922$$
$$x_{20} = 27.2915401590608$$
$$x_{21} = -51.248276180684$$
$$x_{22} = 14.7251695447016$$
$$x_{23} = -16.6907569911963$$
$$x_{24} = -82.664202716582$$
$$x_{25} = -57.5314614878636$$
$$x_{26} = 99.5481711916261$$
$$x_{27} = -41.8234982199146$$
$$x_{28} = -73.2394247558126$$
$$x_{29} = 33.5747254662404$$
$$x_{30} = -35.5403129127351$$
$$x_{31} = -0.982793723247329$$
$$x_{32} = 77.5570226164975$$
$$x_{33} = 71.2738373093179$$
$$x_{34} = -29.2571276055555$$
$$x_{35} = 24.149947505471$$
$$x_{36} = -7.26597903042692$$
$$x_{37} = 58.7074666949587$$
$$x_{38} = -92.0889806773513$$
$$x_{39} = 86.9818005772669$$
$$x_{40} = 93.2649858844465$$
$$x_{41} = -54.3898688342738$$
$$x_{42} = 68.1322446557281$$
$$x_{43} = -22.9739422983759$$
$$x_{44} = -32.3987202591453$$
$$x_{45} = -4.12438637683712$$
$$x_{46} = -88.9473880237615$$
$$x_{47} = -38.6819055663249$$
$$x_{48} = 90.1233932308567$$
$$x_{49} = -48.1066835270942$$
$$x_{50} = -13.5491643376065$$
$$x_{51} = -76.3810174094024$$
$$x_{52} = 55.565874041369$$
$$x_{53} = 30.4331328126506$$
$$x_{54} = -10.4075716840167$$
$$x_{55} = 11.5835768911118$$
$$x_{56} = 17.8667621982914$$
$$x_{57} = 83.8402079236771$$
$$x_{58} = 80.6986152700873$$
$$x_{59} = 13847.1576233006$$
$$x_{60} = 2.15879893034246$$
$$x_{61} = -60.6730541414534$$
$$x_{62} = -66.956239448633$$
$$x_{63} = -63.8146467950432$$
$$x_{64} = 21.0083548518812$$
$$x_{65} = 8.44198423752205$$