El gráfico de la función cruce el eje X con f = 0
o sea hay que resolver la ecuación:
$$\log{\left(\sin{\left(x \right)} \right)} = 0$$
Resolvermos esta ecuaciónPuntos de cruce con el eje X:
Solución analítica$$x_{1} = \frac{\pi}{2}$$
Solución numérica$$x_{1} = -48.6946856746846$$
$$x_{2} = 70.6858344584179$$
$$x_{3} = -61.2610570233699$$
$$x_{4} = 89.5353892520407$$
$$x_{5} = 83.2522055855063$$
$$x_{6} = 58.1194640878142$$
$$x_{7} = -98.9601678624104$$
$$x_{8} = -61.2610552210018$$
$$x_{9} = 58.1194640425023$$
$$x_{10} = -92.6769840888992$$
$$x_{11} = 14.1371669434725$$
$$x_{12} = -67.5442419322395$$
$$x_{13} = 20.4203523413041$$
$$x_{14} = 1.57079660167231$$
$$x_{15} = 20.4203521458531$$
$$x_{16} = -54.9778705207315$$
$$x_{17} = 32.9867236651869$$
$$x_{18} = -10.9955735120111$$
$$x_{19} = 83.2522046133019$$
$$x_{20} = -54.9778719110131$$
$$x_{21} = 51.8362789063255$$
$$x_{22} = 7.85398174556756$$
$$x_{23} = -29.8451302007713$$
$$x_{24} = 45.5530926724619$$
$$x_{25} = 1.57079557309815$$
$$x_{26} = -10.9955733481573$$
$$x_{27} = 95.8185757390985$$
$$x_{28} = 26.7035372979479$$
$$x_{29} = -54.9778706878326$$
$$x_{30} = -4.71238973521995$$
$$x_{31} = -48.694686949957$$
$$x_{32} = -86.3937977199047$$
$$x_{33} = -17.2787590751963$$
$$x_{34} = 64.402649305744$$
$$x_{35} = -61.2610561822839$$
$$x_{36} = 39.2699074534854$$
$$x_{37} = 45.5530919949765$$
$$x_{38} = 26.7035380336909$$
$$x_{39} = -67.5442421737401$$
$$x_{40} = 51.8362786093149$$
$$x_{41} = -73.827427279653$$
$$x_{42} = 76.9690195814988$$
$$x_{43} = -4.71238974981597$$
$$x_{44} = 83.2522046592344$$
$$x_{45} = 76.9690209763474$$
$$x_{46} = -48.6946869113465$$
$$x_{47} = 39.2699086546913$$
$$x_{48} = 32.9867224176774$$
$$x_{49} = -17.2787598626449$$
$$x_{50} = -98.9601690759292$$
$$x_{51} = -92.6769828388254$$
$$x_{52} = -54.9778713174705$$
$$x_{53} = 32.9867238176799$$
$$x_{54} = 14.1371671149845$$
$$x_{55} = -10.9955741211687$$
$$x_{56} = 7.85398147767715$$
$$x_{57} = -36.1283156556098$$
$$x_{58} = -4.71238851018714$$
$$x_{59} = 58.119464370396$$
$$x_{60} = -42.4115005591739$$
$$x_{61} = -92.676984146129$$
$$x_{62} = 70.6858351446748$$
$$x_{63} = -10.9955747464857$$
$$x_{64} = 76.9690208439152$$
$$x_{65} = 45.5530937626454$$
$$x_{66} = -73.8274273885517$$
$$x_{67} = -29.8451300946193$$
$$x_{68} = 83.2522058199769$$
$$x_{69} = -29.8451302446469$$
$$x_{70} = 39.2699074396221$$
$$x_{71} = -23.5619447959101$$
$$x_{72} = 95.8185760669056$$
$$x_{73} = 14.1371668991051$$
$$x_{74} = -98.9601685005998$$
$$x_{75} = -36.1283154154305$$
$$x_{76} = 89.5353909237568$$
$$x_{77} = 89.5353897747913$$
$$x_{78} = -86.3937986220237$$
$$x_{79} = -80.1106125767506$$
$$x_{80} = -23.5619450139675$$
$$x_{81} = -80.1106127903609$$
$$x_{82} = -42.4115015246508$$
$$x_{83} = 32.9867230918614$$
$$x_{84} = 64.4026494793175$$
$$x_{85} = -73.8274273446888$$