El gráfico de la función cruce el eje X con f = 0
o sea hay que resolver la ecuación:
$$\sqrt{3 \cos{\left(x \right)}} + \sin{\left(x \right)} = 0$$
Resolvermos esta ecuaciónPuntos de cruce con el eje X:
Solución analítica$$x_{1} = - 2 \operatorname{atan}{\left(\frac{\sqrt{3} \sqrt{-2 + \sqrt{13}}}{3} \right)}$$
Solución numérica$$x_{1} = -45.2454898275213$$
$$x_{2} = 17.5863632442746$$
$$x_{3} = -82.9446016705988$$
$$x_{4} = 23.8695485514542$$
$$x_{5} = -51.5286751347009$$
$$x_{6} = -95.510972284958$$
$$x_{7} = 86.70140162325$$
$$x_{8} = -26.3959339059825$$
$$x_{9} = 80.4182163160704$$
$$x_{10} = 42.7191044729929$$
$$x_{11} = 55.2854750873521$$
$$x_{12} = -89.2277869777784$$
$$x_{13} = 99.2677722376092$$
$$x_{14} = 49.0022897801725$$
$$x_{15} = -491.351646637272$$
$$x_{16} = 11.303177937095$$
$$x_{17} = 36.4359191658133$$
$$x_{18} = 74.1350310088908$$
$$x_{19} = -1.26319267726419$$
$$x_{20} = -32.6791192131621$$
$$x_{21} = 92.9845869304296$$
$$x_{22} = -70.3782310562396$$
$$x_{23} = -7.54637798444377$$
$$x_{24} = -57.8118604418805$$
$$x_{25} = 61.5686603945317$$
$$x_{26} = -20.1127485988029$$
$$x_{27} = 67.8518457017113$$
$$x_{28} = 30.1527338586337$$
$$x_{29} = -64.09504574906$$
$$x_{30} = -13.8295632916234$$
$$x_{31} = 5.0199926299154$$
$$x_{32} = -76.6614163634192$$
$$x_{33} = -38.9623045203417$$