El gráfico de la función cruce el eje X con f = 0
o sea hay que resolver la ecuación:
$$\sin{\left(2 x + 8 \right)} = 0$$
Resolvermos esta ecuaciónPuntos de cruce con el eje X:
Solución analítica$$x_{1} = -4$$
$$x_{2} = -4 + \frac{\pi}{2}$$
Solución numérica$$x_{1} = -93.5353906273091$$
$$x_{2} = 30.5575191894877$$
$$x_{3} = -55.8362787842316$$
$$x_{4} = 77.6814089933346$$
$$x_{5} = -87.2522053201295$$
$$x_{6} = 90.2477796076938$$
$$x_{7} = 586.619418874881$$
$$x_{8} = 98.1017612416683$$
$$x_{9} = 10.1371669411541$$
$$x_{10} = 74.5398163397448$$
$$x_{11} = 27.4159265358979$$
$$x_{12} = 63.5442420521806$$
$$x_{13} = -24.4203522483337$$
$$x_{14} = -79.398223686155$$
$$x_{15} = 47.8362787842316$$
$$x_{16} = 69.8274273593601$$
$$x_{17} = 52.5486677646163$$
$$x_{18} = -46.4115008234622$$
$$x_{19} = -19.707963267949$$
$$x_{20} = -85.6814089933346$$
$$x_{21} = -91.9645943005142$$
$$x_{22} = 16.4203522483337$$
$$x_{23} = -32.2743338823081$$
$$x_{24} = 54.1194640914112$$
$$x_{25} = 109.097335529233$$
$$x_{26} = 61.9734457253857$$
$$x_{27} = 2.28318530717959$$
$$x_{28} = 39.9822971502571$$
$$x_{29} = -54.2654824574367$$
$$x_{30} = 91.8185759344887$$
$$x_{31} = -49.553093477052$$
$$x_{32} = -10.2831853071796$$
$$x_{33} = -2.4292036732051$$
$$x_{34} = -11.8539816339745$$
$$x_{35} = 38.4115008234622$$
$$x_{36} = -18.1371669411541$$
$$x_{37} = -25.9911485751286$$
$$x_{38} = -21.2787595947439$$
$$x_{39} = -57.4070751110265$$
$$x_{40} = -41.6991118430775$$
$$x_{41} = 85.5353906273091$$
$$x_{42} = -5.5707963267949$$
$$x_{43} = -52.6946861306418$$
$$x_{44} = -69.9734457253857$$
$$x_{45} = -27.5619449019235$$
$$x_{46} = 25.845130209103$$
$$x_{47} = -43.2699081698724$$
$$x_{48} = 0.71238898038469$$
$$x_{49} = -47.9822971502571$$
$$x_{50} = -123.380520836412$$
$$x_{51} = 66.6858347057703$$
$$x_{52} = -99.8185759344887$$
$$x_{53} = -40.1283155162826$$
$$x_{54} = 68.2566310325652$$
$$x_{55} = 88.6769832808989$$
$$x_{56} = -63.6902604182061$$
$$x_{57} = -65.261056745001$$
$$x_{58} = 55.6902604182061$$
$$x_{59} = -90.3937979737193$$
$$x_{60} = -98.2477796076938$$
$$x_{61} = 46.2654824574367$$
$$x_{62} = 82.3937979737193$$
$$x_{63} = 3.85398163397448$$
$$x_{64} = -84.1106126665397$$
$$x_{65} = 8.56637061435917$$
$$x_{66} = -68.4026493985908$$
$$x_{67} = 22.7035375555132$$
$$x_{68} = 19.5619449019235$$
$$x_{69} = 96.5309649148734$$
$$x_{70} = -13.4247779607694$$
$$x_{71} = 24.2743338823081$$
$$x_{72} = 44.6946861306418$$
$$x_{73} = -77.8274273593601$$
$$x_{74} = -44.8407044966673$$
$$x_{75} = 83.9645943005142$$
$$x_{76} = -76.2566310325652$$
$$x_{77} = -71.5442420521806$$
$$x_{78} = 32.1283155162826$$
$$x_{79} = 33.6991118430775$$
$$x_{80} = 11.707963267949$$
$$x_{81} = -4$$
$$x_{82} = 41.553093477052$$
$$x_{83} = -62.1194640914112$$
$$x_{84} = 99.6725575684632$$
$$x_{85} = 76.1106126665397$$
$$x_{86} = 60.4026493985908$$
$$x_{87} = -35.4159265358979$$
$$x_{88} = -33.845130209103$$
$$x_{89} = 17.9911485751286$$