El gráfico de la función cruce el eje X con f = 0
o sea hay que resolver la ecuación:
$$\tan{\left(2 x \right)} \cot{\left(6 x \right)} = 0$$
Resolvermos esta ecuaciónPuntos de cruce con el eje X:
Solución numérica$$x_{1} = -1.83259571459405$$
$$x_{2} = -64.1408500107916$$
$$x_{3} = 50.0036830696375$$
$$x_{4} = -108.123147161049$$
$$x_{5} = 26.4417381677141$$
$$x_{6} = -93.9859802198946$$
$$x_{7} = 31.6777259236971$$
$$x_{8} = -48.9564855184409$$
$$x_{9} = -51.5744793964324$$
$$x_{10} = -15.9697626557481$$
$$x_{11} = -67.8060414399797$$
$$x_{12} = -28.012534494509$$
$$x_{13} = 68.8532389911763$$
$$x_{14} = 43.720497762458$$
$$x_{15} = -23.8237442897226$$
$$x_{16} = -6.02138591938044$$
$$x_{17} = 12.30457122656$$
$$x_{18} = 87.7027949127151$$
$$x_{19} = 24.8709418409192$$
$$x_{20} = -95.5567765466895$$
$$x_{21} = 79.8488132787406$$
$$x_{22} = 71.9948316447661$$
$$x_{23} = -53.6688744988256$$
$$x_{24} = 81.9432083811338$$
$$x_{25} = 98.6983692002793$$
$$x_{26} = 54.7160720500222$$
$$x_{27} = -89.7971900151083$$
$$x_{28} = 34.2957198016886$$
$$x_{29} = 30.1069295969022$$
$$x_{30} = -86.1319985859202$$
$$x_{31} = -79.8488132787406$$
$$x_{32} = -23.3001455141243$$
$$x_{33} = 20.1585528605345$$
$$x_{34} = -87.7027949127151$$
$$x_{35} = -13.8753675533549$$
$$x_{36} = 48.4328867428426$$
$$x_{37} = -44.2440965380563$$
$$x_{38} = -81.9432083811338$$
$$x_{39} = 100.269165527074$$
$$x_{40} = 8.11578102177363$$
$$x_{41} = -35.8665161284835$$
$$x_{42} = 59.9520598060052$$
$$x_{43} = 74.0892267471593$$
$$x_{44} = 44.2440965380563$$
$$x_{45} = -57.857664703612$$
$$x_{46} = 42.1497014356631$$
$$x_{47} = 93.9859802198946$$
$$x_{48} = -59.9520598060052$$
$$x_{49} = -6.54498469497874$$
$$x_{50} = 315.991861073573$$
$$x_{51} = 6.02138591938044$$
$$x_{52} = 15.9697626557481$$
$$x_{53} = 90.8443875663049$$
$$x_{54} = -97.6511716490827$$
$$x_{55} = -75.1364242983559$$
$$x_{56} = -30.1069295969022$$
$$x_{57} = -105.505153283057$$
$$x_{58} = -21.7293491873294$$
$$x_{59} = 76.7072206251508$$
$$x_{60} = 92.4151838930998$$
$$x_{61} = 17.540558982543$$
$$x_{62} = -73.565627971561$$
$$x_{63} = 22.2529479629277$$
$$x_{64} = 66.2352451131848$$
$$x_{65} = -62.5700536839967$$
$$x_{66} = -657.901861539263$$
$$x_{67} = -65.7116463375865$$
$$x_{68} = -75.6600230739542$$
$$x_{69} = -26.9653369433124$$
$$x_{70} = 52.0980781720307$$
$$x_{71} = -34.2957198016886$$
$$x_{72} = 56.2868683768171$$
$$x_{73} = 10.7337748997651$$
$$x_{74} = 64.1408500107916$$
$$x_{75} = -71.9948316447661$$
$$x_{76} = -9.68657734856853$$
$$x_{77} = 55.2396708256205$$
$$x_{78} = 86.1319985859202$$
$$x_{79} = 96.0803753222878$$
$$x_{80} = 70.4240353179712$$
$$x_{81} = -77.2308194007491$$
$$x_{82} = -45.8148928648512$$
$$x_{83} = -4.45058959258554$$
$$x_{84} = 78.2780169519457$$
$$x_{85} = -31.6777259236971$$
$$x_{86} = -37.9609112308767$$
$$x_{87} = -43.720497762458$$
$$x_{88} = 39.5317075576716$$
$$x_{89} = -350.549380263061$$
$$x_{90} = 88.2263936883134$$
$$x_{91} = 28.012534494509$$
$$x_{92} = -50.0036830696375$$
$$x_{93} = 37.9609112308767$$