El gráfico de la función cruce el eje X con f = 0
o sea hay que resolver la ecuación:
$$\sin{\left(3 x + 2 \right)} = 0$$
Resolvermos esta ecuaciónPuntos de cruce con el eje X:
Solución analítica$$x_{1} = - \frac{2}{3}$$
$$x_{2} = - \frac{2}{3} + \frac{\pi}{3}$$
Solución numérica$$x_{1} = -63.4985197384625$$
$$x_{2} = -73.9704952504285$$
$$x_{3} = -21.6106176905986$$
$$x_{4} = 2.47492598692313$$
$$x_{5} = 97.7699031458135$$
$$x_{6} = -89.6784585183775$$
$$x_{7} = -25.799407895385$$
$$x_{8} = -65.5929148408557$$
$$x_{9} = -36.271383407351$$
$$x_{10} = -27.8938029977782$$
$$x_{11} = -85.4896683135911$$
$$x_{12} = 31.7964574204279$$
$$x_{13} = -67.6873099432489$$
$$x_{14} = 82.0619398778646$$
$$x_{15} = -71.8761001480353$$
$$x_{16} = -494.943910831461$$
$$x_{17} = 86.2507300826509$$
$$x_{18} = -6776.03482290865$$
$$x_{19} = -62.4513221872659$$
$$x_{20} = -100.150434030343$$
$$x_{21} = 13.9940990500857$$
$$x_{22} = 53.7876059955564$$
$$x_{23} = -12.1858397298292$$
$$x_{24} = 7.71091374290611$$
$$x_{25} = 44.362828034787$$
$$x_{26} = -98.0560389279503$$
$$x_{27} = 68.4483717123088$$
$$x_{28} = 64.2595815075224$$
$$x_{29} = 90.4395202874373$$
$$x_{30} = 62.1651864051292$$
$$x_{31} = 40.1740378300006$$
$$x_{32} = -54.0737417776932$$
$$x_{33} = 38.0796427276074$$
$$x_{34} = 69.4955692635054$$
$$x_{35} = 96.7227055946169$$
$$x_{36} = -49.8849515729068$$
$$x_{37} = 5.61651864051292$$
$$x_{38} = 99.8642982482067$$
$$x_{39} = -7.99704952504285$$
$$x_{40} = -93.8672487231639$$
$$x_{41} = -16.3746299346156$$
$$x_{42} = 57.9763962003428$$
$$x_{43} = -45.6961613681204$$
$$x_{44} = -29.9881981001714$$
$$x_{45} = -41.507371163334$$
$$x_{46} = 22.3716794596585$$
$$x_{47} = -19.5162225882054$$
$$x_{48} = 77.8731496730782$$
$$x_{49} = 18.1828892548721$$
$$x_{50} = 0.380530884529931$$
$$x_{51} = -51.9793466753$$
$$x_{52} = 94.6283104922237$$
$$x_{53} = -87.5840634159843$$
$$x_{54} = -78.1592854552149$$
$$x_{55} = 24.4660745620517$$
$$x_{56} = -5.90265442264966$$
$$x_{57} = 60.070791302736$$
$$x_{58} = -39.4129760609408$$
$$x_{59} = -91.7728536207707$$
$$x_{60} = 55.8820010979496$$
$$x_{61} = 20.2772843572653$$
$$x_{62} = -56.1681368800863$$
$$x_{63} = -1.71386421786326$$
$$x_{64} = -47.7905564705136$$
$$x_{65} = -10.091444627436$$
$$x_{66} = 92.5339153898305$$
$$x_{67} = 48.5516182395734$$
$$x_{68} = -14.2802348322224$$
$$x_{69} = 84.1563349802578$$
$$x_{70} = -43.6017662657272$$
$$x_{71} = 23.4188770108551$$
$$x_{72} = 79.9675447754714$$
$$x_{73} = -58.2625319824795$$
$$x_{74} = 75.778754570685$$
$$x_{75} = 35.9852476252143$$
$$x_{76} = 70.542766814702$$
$$x_{77} = -76.0648903528217$$
$$x_{78} = 33.8908525228211$$
$$x_{79} = 29.7020623180347$$
$$x_{80} = -80.2536805576081$$
$$x_{81} = 66.3539766099156$$
$$x_{82} = -23.7050127929918$$
$$x_{83} = -3.80825932025646$$
$$x_{84} = 42.2684329323938$$
$$x_{85} = -37.3185809585476$$
$$x_{86} = -95.9616438255571$$
$$x_{87} = -34.1769883049578$$
$$x_{88} = 16.0884941524789$$
$$x_{89} = 88.3451251850441$$
$$x_{90} = 46.4572231371802$$
$$x_{91} = -32.0825932025646$$
$$x_{92} = 9.80530884529931$$
$$x_{93} = -69.7817050456421$$
$$x_{94} = 11.8997039476925$$
$$x_{95} = 51.6932108931632$$