El gráfico de la función cruce el eje X con f = 0
o sea hay que resolver la ecuación:
$$\sqrt{\frac{\sin{\left(x \right)} + 1}{2}} + \cos{\left(x \right)} = 0$$
Resolvermos esta ecuaciónPuntos de cruce con el eje X:
Solución analítica$$x_{1} = - \frac{\pi}{2}$$
$$x_{2} = \frac{5 \pi}{6}$$
Solución numérica$$x_{1} = 42.4115008234622$$
$$x_{2} = 54.9778714378214$$
$$x_{3} = -47.6474885794452$$
$$x_{4} = 21.4675497995303$$
$$x_{5} = 29.845130209103$$
$$x_{6} = 52.8834763354282$$
$$x_{7} = -95.8185759344887$$
$$x_{8} = -79.0634151153431$$
$$x_{9} = -64.4026493985908$$
$$x_{10} = -66.497044500984$$
$$x_{11} = -72.7802298081635$$
$$x_{12} = 15.1843644923507$$
$$x_{13} = 48.6946861306418$$
$$x_{14} = -127.234502470387$$
$$x_{15} = -32.9867228626928$$
$$x_{16} = 84.2994028713261$$
$$x_{17} = 90.5825881785057$$
$$x_{18} = 10.9955742875643$$
$$x_{19} = -7.85398163397448$$
$$x_{20} = -76.9690200129499$$
$$x_{21} = 78.0162175641465$$
$$x_{22} = 98.9601685880785$$
$$x_{23} = 2.61799387799149$$
$$x_{24} = -41.3643032722656$$
$$x_{25} = 574.387856831334$$
$$x_{26} = 36.1283155162826$$
$$x_{27} = -22.5147473507269$$
$$x_{28} = 23.5619449019235$$
$$x_{29} = 96.8657734856853$$
$$x_{30} = -45.553093477052$$
$$x_{31} = -60.2138591938044$$
$$x_{32} = -53.9306738866248$$
$$x_{33} = -1.5707963267949$$
$$x_{34} = 67.5442420521806$$
$$x_{35} = 92.6769832808989$$
$$x_{36} = -58.1194640914112$$
$$x_{37} = 73.8274273593601$$
$$x_{38} = -39.2699081698724$$
$$x_{39} = 27.7507351067098$$
$$x_{40} = 65.4498469497874$$
$$x_{41} = -70.6858347057703$$
$$x_{42} = 80.1106126665397$$
$$x_{43} = -16.2315620435473$$
$$x_{44} = -9.94837673636768$$
$$x_{45} = -3.66519142918809$$
$$x_{46} = -14.1371669411541$$
$$x_{47} = -28.7979326579064$$
$$x_{48} = 81093.4075683377$$
$$x_{49} = -97.9129710368819$$
$$x_{50} = -83.2522053201295$$
$$x_{51} = -89.5353906273091$$
$$x_{52} = 86.3937979737193$$
$$x_{53} = 40.317105721069$$
$$x_{54} = 46.6002910282486$$
$$x_{55} = 59.1666616426078$$
$$x_{56} = 8.90117918517108$$
$$x_{57} = -91.6297857297023$$
$$x_{58} = -26.7035375555132$$
$$x_{59} = 34.0339204138894$$
$$x_{60} = 61.261056745001$$
$$x_{61} = 71.733032256967$$
$$x_{62} = -85.3466004225227$$
$$x_{63} = 926.246234033391$$
$$x_{64} = -51.8362787842316$$
$$x_{65} = 17.2787595947439$$
$$x_{66} = 4.71238898038469$$
$$x_{67} = -20.4203522483337$$
$$x_{68} = -35.081117965086$$