El gráfico de la función cruce el eje X con f = 0
o sea hay que resolver la ecuación:
$$\sin{\left(8 x \right)} \cot{\left(4 x \right)} = 0$$
Resolvermos esta ecuaciónPuntos de cruce con el eje X:
Solución numérica$$x_{1} = 39.6626074354068$$
$$x_{2} = -77.3617192672069$$
$$x_{3} = -31.808625564255$$
$$x_{4} = -75.7909227328378$$
$$x_{5} = 53.7997740492615$$
$$x_{6} = -21.5984495258895$$
$$x_{7} = -61.6537558730453$$
$$x_{8} = -100.138265790463$$
$$x_{9} = -82.0741080265313$$
$$x_{10} = -45.9457926801668$$
$$x_{11} = 88.3572933346565$$
$$x_{12} = -87.5718951994764$$
$$x_{13} = -27.096236512184$$
$$x_{14} = -53.7997741488026$$
$$x_{15} = 40.4480055463487$$
$$x_{16} = 1.9634954407948$$
$$x_{17} = 12.1736716060449$$
$$x_{18} = 49.8727834233509$$
$$x_{19} = 81.2887097633325$$
$$x_{20} = -93.8550804592948$$
$$x_{21} = 56.1559687726584$$
$$x_{22} = 62.4391540604724$$
$$x_{23} = 30.2378293002316$$
$$x_{24} = -35.7356164447372$$
$$x_{25} = 64.0099503037514$$
$$x_{26} = 66.3661447595544$$
$$x_{27} = -34.1648200932558$$
$$x_{28} = 31.8086255341372$$
$$x_{29} = 48.3019870172534$$
$$x_{30} = 63.2245521062676$$
$$x_{31} = 52.2289778827223$$
$$x_{32} = -13.7444678634856$$
$$x_{33} = 18.4568567586527$$
$$x_{34} = -97.7820713163696$$
$$x_{35} = -86.001098890713$$
$$x_{36} = 9.81747700602707$$
$$x_{37} = -23.9546440740002$$
$$x_{38} = -20.0276531403711$$
$$x_{39} = -57.7267650255918$$
$$x_{40} = 74.2201264656603$$
$$x_{41} = 23.9546440210414$$
$$x_{42} = -42.0188017225664$$
$$x_{43} = 71.8639319947566$$
$$x_{44} = 22.3838476129746$$
$$x_{45} = -16.1006622978513$$
$$x_{46} = 70.2931355967826$$
$$x_{47} = -79.7179136060482$$
$$x_{48} = 45.9457926004478$$
$$x_{49} = 27.8816348506178$$
$$x_{50} = -68.722339311987$$
$$x_{51} = -38.0918108733342$$
$$x_{52} = 67.9369411790693$$
$$x_{53} = -56.1559686551596$$
$$x_{54} = 42.0188017145847$$
$$x_{55} = -1.96349547327712$$
$$x_{56} = 12.1736717218817$$
$$x_{57} = 5.89048627683018$$
$$x_{58} = 23.9546439953203$$
$$x_{59} = 86.0010988906865$$
$$x_{60} = -71.0785337808521$$
$$x_{61} = 96.2112750490707$$
$$x_{62} = 89.9280897569419$$
$$x_{63} = 92.2842841767324$$
$$x_{64} = 26.3108384381649$$
$$x_{65} = -60.0829594495682$$
$$x_{66} = 44.3749961855592$$
$$x_{67} = -64.0099503059433$$
$$x_{68} = 78.1471173376857$$
$$x_{69} = -65.5807466492376$$
$$x_{70} = 34.1648201908862$$
$$x_{71} = -9.81747697923826$$
$$x_{72} = -43.5895980903384$$
$$x_{73} = -12.1736715381875$$
$$x_{74} = -78.1471172213944$$
$$x_{75} = -39.6626072961206$$
$$x_{76} = 84.4303025926259$$
$$x_{77} = -67.9369412836569$$
$$x_{78} = 4.31968985954535$$
$$x_{79} = -17.671458718567$$
$$x_{80} = 93.8550805643735$$
$$x_{81} = 8.24668071816742$$
$$x_{82} = 20.0276531225419$$
$$x_{83} = 82.0741081479066$$
$$x_{84} = -83.6449044492454$$