El gráfico de la función cruce el eje X con f = 0
o sea hay que resolver la ecuación:
$$2 \sin{\left(x \right)} + 5 \cos{\left(x \right)} = 0$$
Resolvermos esta ecuaciónPuntos de cruce con el eje X:
Solución analítica$$x_{1} = - \operatorname{atan}{\left(\frac{5}{2} \right)}$$
Solución numérica$$x_{1} = -92.2964769037865$$
$$x_{2} = 23.9424512790358$$
$$x_{3} = 61.6415631221133$$
$$x_{4} = 49.0751925077542$$
$$x_{5} = -82.8716989430172$$
$$x_{6} = -7.47347525686212$$
$$x_{7} = 93.0574896580113$$
$$x_{8} = -32.6062164855805$$
$$x_{9} = -38.88940179276$$
$$x_{10} = -2806.63252960537$$
$$x_{11} = -16.8982532176315$$
$$x_{12} = 80.4911190436521$$
$$x_{13} = 36.508821893395$$
$$x_{14} = 11.3760806646766$$
$$x_{15} = -23.1814385248111$$
$$x_{16} = 105.62386027237$$
$$x_{17} = -60.8805503678886$$
$$x_{18} = 39.6504145469848$$
$$x_{19} = -51.4557724071192$$
$$x_{20} = 1.95130270390726$$
$$x_{21} = 14.5176733182664$$
$$x_{22} = 77.3495263900623$$
$$x_{23} = -98.5796622109661$$
$$x_{24} = 45.9335998541644$$
$$x_{25} = 71.0663410828827$$
$$x_{26} = 58.4999704685235$$
$$x_{27} = 17.6592659718562$$
$$x_{28} = -4.33188260327232$$
$$x_{29} = 33.3672292398052$$
$$x_{30} = -20.0398458712213$$
$$x_{31} = -64.0221430214784$$
$$x_{32} = -26.3230311784009$$
$$x_{33} = -79.7301062894274$$
$$x_{34} = -76.5885136358376$$
$$x_{35} = 89.9158970044215$$
$$x_{36} = 27.0840439326256$$
$$x_{37} = 99.3406749651909$$
$$x_{38} = 64.7831557757031$$
$$x_{39} = -1.19028994968253$$
$$x_{40} = -86.0132915966069$$
$$x_{41} = -42.0309944463498$$
$$x_{42} = -35.7478091391703$$
$$x_{43} = -13.7566605640417$$
$$x_{44} = 20.800858625446$$
$$x_{45} = -95.4380695573763$$
$$x_{46} = 83.6327116972419$$
$$x_{47} = 30.2256365862154$$
$$x_{48} = 67.9247484292929$$
$$x_{49} = 8.23448801108685$$
$$x_{50} = 52.216785161344$$
$$x_{51} = 96.1990823116011$$
$$x_{52} = -29.4646238319907$$
$$x_{53} = -57.7389577142988$$
$$x_{54} = -48.3141797535294$$
$$x_{55} = 8958.63195808841$$
$$x_{56} = -114.287625478915$$
$$x_{57} = -54.597365060709$$
$$x_{58} = -45.1725870999396$$
$$x_{59} = 55.3583778149337$$
$$x_{60} = 5.09289535749705$$
$$x_{61} = -610.659264746102$$
$$x_{62} = 86.7743043508317$$
$$x_{63} = -10.6150679104519$$
$$x_{64} = -70.305328328658$$
$$x_{65} = -89.1548842501967$$
$$x_{66} = -67.1637356750682$$
$$x_{67} = 74.2079337364725$$
$$x_{68} = 42.7920072005746$$
$$x_{69} = -73.4469209822478$$