El gráfico de la función cruce el eje X con f = 0
o sea hay que resolver la ecuación:
$$\sin{\left(x \right)} \sin{\left(x + 1 \right)} = 0$$
Resolvermos esta ecuaciónPuntos de cruce con el eje X:
Solución analítica$$x_{1} = -1$$
$$x_{2} = 0$$
Solución numérica$$x_{1} = -41.8407044966673$$
$$x_{2} = -34.5575191894877$$
$$x_{3} = -29.2743338823081$$
$$x_{4} = -92.106186954104$$
$$x_{5} = -73.2566310325652$$
$$x_{6} = -59.6902604182061$$
$$x_{7} = 21.9911485751286$$
$$x_{8} = 43.9822971502571$$
$$x_{9} = 15.707963267949$$
$$x_{10} = -48.1238898038469$$
$$x_{11} = 37.6991118430775$$
$$x_{12} = -26.1327412287183$$
$$x_{13} = 53.4070751110265$$
$$x_{14} = -19.8495559215388$$
$$x_{15} = -100.530964914873$$
$$x_{16} = -44.9822971502571$$
$$x_{17} = -12.5663706143592$$
$$x_{18} = -6.28318530717959$$
$$x_{19} = 78.5398163397448$$
$$x_{20} = -79.5398163397448$$
$$x_{21} = 14.707963267949$$
$$x_{22} = 83.8230016469244$$
$$x_{23} = 61.8318530717959$$
$$x_{24} = -70.1150383789755$$
$$x_{25} = 68.1150383789755$$
$$x_{26} = -95.2477796076938$$
$$x_{27} = -695.291976443344$$
$$x_{28} = -63.8318530717959$$
$$x_{29} = 94.2477796076938$$
$$x_{30} = 12.5663706143592$$
$$x_{31} = 31.4159265358979$$
$$x_{32} = 17.8495559215388$$
$$x_{33} = 39.8407044966673$$
$$x_{34} = 81.6814089933346$$
$$x_{35} = 2.14159265358979$$
$$x_{36} = -72.2566310325652$$
$$x_{37} = -51.2654824574367$$
$$x_{38} = 0$$
$$x_{39} = 75.398223686155$$
$$x_{40} = -50.2654824574367$$
$$x_{41} = -81.6814089933346$$
$$x_{42} = 9.42477796076938$$
$$x_{43} = -7.28318530717959$$
$$x_{44} = -87.9645943005142$$
$$x_{45} = 6.28318530717959$$
$$x_{46} = 96.3893722612836$$
$$x_{47} = -66.9734457253857$$
$$x_{48} = -37.6991118430775$$
$$x_{49} = 36.6991118430775$$
$$x_{50} = 52.4070751110265$$
$$x_{51} = 34.5575191894877$$
$$x_{52} = 65.9734457253857$$
$$x_{53} = -28.2743338823081$$
$$x_{54} = 72.2566310325652$$
$$x_{55} = 90.106186954104$$
$$x_{56} = -22.9911485751286$$
$$x_{57} = -78.5398163397448$$
$$x_{58} = -43.9822971502571$$
$$x_{59} = -85.8230016469244$$
$$x_{60} = 46.1238898038469$$
$$x_{61} = 74.398223686155$$
$$x_{62} = 58.6902604182061$$
$$x_{63} = -4.14159265358979$$
$$x_{64} = 87.9645943005142$$
$$x_{65} = 59.6902604182061$$
$$x_{66} = -255.469004940773$$
$$x_{67} = 100.530964914873$$
$$x_{68} = -35.5575191894877$$
$$x_{69} = 28.2743338823081$$
$$x_{70} = 97.3893722612836$$
$$x_{71} = -94.2477796076938$$
$$x_{72} = -56.5486677646163$$
$$x_{73} = -57.5486677646163$$
$$x_{74} = -21.9911485751286$$
$$x_{75} = 80.6814089933346$$
$$x_{76} = 56.5486677646163$$
$$x_{77} = -65.9734457253857$$
$$x_{78} = -924.628240155399$$
$$x_{79} = -13.5663706143592$$
$$x_{80} = -15.707963267949$$
$$x_{81} = 84.8230016469244$$
$$x_{82} = 30.4159265358979$$
$$x_{83} = 24.1327412287183$$
$$x_{84} = 50.2654824574367$$
$$x_{85} = 8.42477796076938$$