El gráfico de la función cruce el eje X con f = 0
o sea hay que resolver la ecuación:
$$\log{\left(\sin{\left(x \right)} \right)} \sin{\left(x \right)} = 0$$
Resolvermos esta ecuaciónPuntos de cruce con el eje X:
Solución analítica$$x_{1} = \frac{\pi}{2}$$
Solución numérica$$x_{1} = 26.703537754537$$
$$x_{2} = -92.6769830516992$$
$$x_{3} = 50.2654824574367$$
$$x_{4} = 6.28318530717959$$
$$x_{5} = -37.6991118430775$$
$$x_{6} = -17.2787598058454$$
$$x_{7} = -98.960168748018$$
$$x_{8} = 26.7035373488664$$
$$x_{9} = 64.4026493087279$$
$$x_{10} = 20.4203521497632$$
$$x_{11} = 70.6858345039186$$
$$x_{12} = -28.2743338823081$$
$$x_{13} = 32.9867226589597$$
$$x_{14} = 89.5353908510716$$
$$x_{15} = -61.2610573422182$$
$$x_{16} = -59.6902604182061$$
$$x_{17} = 76.9690198006843$$
$$x_{18} = 89.5353907650194$$
$$x_{19} = -4.71238876279253$$
$$x_{20} = -81.6814089933346$$
$$x_{21} = -87.9645943005142$$
$$x_{22} = 45.5530935231968$$
$$x_{23} = 28.2743338823081$$
$$x_{24} = 94.2477796076938$$
$$x_{25} = -86.3937977675751$$
$$x_{26} = 14.1371671044412$$
$$x_{27} = 58.1194645176037$$
$$x_{28} = 95.8185760588986$$
$$x_{29} = 15.707963267949$$
$$x_{30} = -73.827427280041$$
$$x_{31} = -23.5619450089678$$
$$x_{32} = -65.9734457253857$$
$$x_{33} = 59.6902604182061$$
$$x_{34} = 39.2699083790696$$
$$x_{35} = -42.411500612401$$
$$x_{36} = -43.9822971502571$$
$$x_{37} = -29.8451300963772$$
$$x_{38} = 100.530964914873$$
$$x_{39} = 72.2566310325652$$
$$x_{40} = 83.252205518674$$
$$x_{41} = -80.1106125795969$$
$$x_{42} = -15.707963267949$$
$$x_{43} = 12.5663706143592$$
$$x_{44} = -31.4159265358979$$
$$x_{45} = 83.2522051984916$$
$$x_{46} = 65.9734457253857$$
$$x_{47} = 56.5486677646163$$
$$x_{48} = -48.6946859064876$$
$$x_{49} = -21.9911485751286$$
$$x_{50} = -67.5442421674748$$
$$x_{51} = -17.2787597985022$$
$$x_{52} = -75.398223686155$$
$$x_{53} = 1.5707965424425$$
$$x_{54} = 51.8362788998966$$
$$x_{55} = -10.9955744802222$$
$$x_{56} = 21.9911485751286$$
$$x_{57} = 7.85398174051698$$
$$x_{58} = -54.9778716161914$$
$$x_{59} = -61.2610569601929$$
$$x_{60} = -72.2566310325652$$
$$x_{61} = -36.1283154192906$$
$$x_{62} = 43.9822971502571$$
$$x_{63} = 45.5530936969395$$