El gráfico de la función cruce el eje X con f = 0
o sea hay que resolver la ecuación:
$$\frac{3 \sin{\left(x - \frac{3}{2} \right)}}{2} = 0$$
Resolvermos esta ecuaciónPuntos de cruce con el eje X:
Solución analítica$$x_{1} = \frac{3}{2}$$
$$x_{2} = \frac{3}{2} + \pi$$
Solución numérica$$x_{1} = 1.5$$
$$x_{2} = 61.1902604182061$$
$$x_{3} = 98.8893722612836$$
$$x_{4} = -17.3495559215388$$
$$x_{5} = 36.0575191894877$$
$$x_{6} = 39.1991118430775$$
$$x_{7} = -4.78318530717959$$
$$x_{8} = -33.0575191894877$$
$$x_{9} = 23.4911485751286$$
$$x_{10} = 17.207963267949$$
$$x_{11} = -86.4645943005142$$
$$x_{12} = -14.207963267949$$
$$x_{13} = 108.314150222053$$
$$x_{14} = -85446.6785849888$$
$$x_{15} = -36.1991118430775$$
$$x_{16} = 42.3407044966673$$
$$x_{17} = -77.0398163397448$$
$$x_{18} = -42.4822971502571$$
$$x_{19} = -11.0663706143592$$
$$x_{20} = 95.7477796076938$$
$$x_{21} = 70.6150383789755$$
$$x_{22} = 83.1814089933346$$
$$x_{23} = -73.898223686155$$
$$x_{24} = 51.7654824574367$$
$$x_{25} = -26.7743338823081$$
$$x_{26} = -39.3407044966673$$
$$x_{27} = -61.3318530717959$$
$$x_{28} = 10.9247779607694$$
$$x_{29} = 7.78318530717959$$
$$x_{30} = 54.9070751110265$$
$$x_{31} = -83.3230016469244$$
$$x_{32} = -51.9070751110265$$
$$x_{33} = -29.9159265358979$$
$$x_{34} = -95.8893722612836$$
$$x_{35} = 29.7743338823081$$
$$x_{36} = 58.0486677646163$$
$$x_{37} = 48.6238898038469$$
$$x_{38} = 26.6327412287183$$
$$x_{39} = 45.4822971502571$$
$$x_{40} = -48.7654824574367$$
$$x_{41} = 92.606186954104$$
$$x_{42} = 20.3495559215388$$
$$x_{43} = -55.0486677646163$$
$$x_{44} = 80.0398163397448$$
$$x_{45} = 14.0663706143592$$
$$x_{46} = -23.6327412287183$$
$$x_{47} = 89.4645943005142$$
$$x_{48} = -45.6238898038469$$
$$x_{49} = -7.92477796076938$$
$$x_{50} = -1.64159265358979$$
$$x_{51} = -92.7477796076938$$
$$x_{52} = 73.7566310325652$$
$$x_{53} = 67.4734457253857$$
$$x_{54} = -70.7566310325652$$
$$x_{55} = -20.4911485751286$$
$$x_{56} = 64.3318530717959$$
$$x_{57} = 86.3230016469244$$
$$x_{58} = -58.1902604182061$$
$$x_{59} = -89.606186954104$$
$$x_{60} = 76.898223686155$$
$$x_{61} = -99.0309649148734$$
$$x_{62} = -64.4734457253857$$
$$x_{63} = 4.64159265358979$$
$$x_{64} = -67.6150383789755$$
$$x_{65} = 32.9159265358979$$
$$x_{66} = -80.1814089933346$$