El gráfico de la función cruce el eje X con f = 0
o sea hay que resolver la ecuación:
$$\sin{\left(x + \frac{19}{100} \right)} \cos{\left(x + \frac{19}{100} \right)} = 0$$
Resolvermos esta ecuaciónPuntos de cruce con el eje X:
Solución analítica$$x_{1} = - \frac{19}{100}$$
$$x_{2} = - \frac{19}{100} + \frac{\pi}{2}$$
$$x_{3} = - \frac{\pi}{2} - \frac{19}{100}$$
Solución numérica$$x_{1} = -88.1545943005142$$
$$x_{2} = -17.4687595947439$$
$$x_{3} = 98.7701685880785$$
$$x_{4} = -69.3050383789755$$
$$x_{5} = -52.0262787842316$$
$$x_{6} = -28.4643338823081$$
$$x_{7} = -22.1811485751286$$
$$x_{8} = 73.6374273593601$$
$$x_{9} = 94.0577796076938$$
$$x_{10} = -30.035130209103$$
$$x_{11} = 20.2303522483337$$
$$x_{12} = -47.3138898038469$$
$$x_{13} = -96.0085759344887$$
$$x_{14} = -14.3271669411541$$
$$x_{15} = -0.19$$
$$x_{16} = -72.4466310325653$$
$$x_{17} = 7.66398163397448$$
$$x_{18} = 92.4869832808989$$
$$x_{19} = 40.6507044966673$$
$$x_{20} = 86.2037979737193$$
$$x_{21} = -44.1722971502571$$
$$x_{22} = -9.61477796076938$$
$$x_{23} = -31.6059265358979$$
$$x_{24} = -80.3006126665397$$
$$x_{25} = 70.4958347057703$$
$$x_{26} = 37.5091118430775$$
$$x_{27} = -8.04398163397448$$
$$x_{28} = 50.0754824574367$$
$$x_{29} = -53.5970751110265$$
$$x_{30} = 26.5135375555132$$
$$x_{31} = -58.3094640914112$$
$$x_{32} = 95.6285759344887$$
$$x_{33} = -78.7298163397448$$
$$x_{34} = 79.9206126665397$$
$$x_{35} = -6.47318530717959$$
$$x_{36} = -36.3183155162826$$
$$x_{37} = 21.8011485751286$$
$$x_{38} = -97.5793722612836$$
$$x_{39} = -39.4599081698724$$
$$x_{40} = 13.9471669411541$$
$$x_{41} = -15.897963267949$$
$$x_{42} = -91.296186954104$$
$$x_{43} = -45.743093477052$$
$$x_{44} = 87.7745943005142$$
$$x_{45} = -67.7342420521805$$
$$x_{46} = -81.8714089933346$$
$$x_{47} = 29.655130209103$$
$$x_{48} = 51.6462787842316$$
$$x_{49} = 72.0666310325652$$
$$x_{50} = 12.3763706143592$$
$$x_{51} = -622.225345410779$$
$$x_{52} = 64.2126493985908$$
$$x_{53} = -37.8891118430775$$
$$x_{54} = 18.6595559215388$$
$$x_{55} = 48.5046861306418$$
$$x_{56} = -23.7519449019234$$
$$x_{57} = 59.5002604182061$$
$$x_{58} = 34.3675191894877$$
$$x_{59} = 65.7834457253857$$
$$x_{60} = -61.451056745001$$
$$x_{61} = 42.2215008234622$$
$$x_{62} = -103.862557568463$$
$$x_{63} = 56.3586677646163$$
$$x_{64} = -94.4377796076938$$
$$x_{65} = 4.52238898038469$$
$$x_{66} = 78.3498163397448$$
$$x_{67} = -1.7607963267949$$
$$x_{68} = -3.33159265358979$$
$$x_{69} = -89.7253906273091$$
$$x_{70} = 35.9383155162826$$
$$x_{71} = 6.09318530717959$$
$$x_{72} = 100.340964914873$$
$$x_{73} = -75.588223686155$$
$$x_{74} = -25.3227412287183$$
$$x_{75} = 28.0843338823081$$
$$x_{76} = -74.0174273593601$$
$$x_{77} = -66.1634457253857$$
$$x_{78} = 57.9294640914112$$
$$x_{79} = 68.9250383789755$$
$$x_{80} = 15.517963267949$$
$$x_{81} = 43.7922971502571$$
$$x_{82} = 62.6418530717959$$
$$x_{83} = 81.4914089933346$$
$$x_{84} = -59.8802604182061$$
$$x_{85} = -50.4554824574367$$
$$x_{86} = 84.6330016469244$$
$$x_{87} = -83.4422053201295$$