El gráfico de la función cruce el eje X con f = 0
o sea hay que resolver la ecuación:
$$\cos{\left(x + \frac{157}{2 \cdot 50} \right)} = 0$$
Resolvermos esta ecuaciónPuntos de cruce con el eje X:
Solución analítica$$x_{1} = - \frac{157}{100} + \frac{\pi}{2}$$
$$x_{2} = - \frac{157}{100} + \frac{3 \pi}{2}$$
Solución numérica$$x_{1} = -21.9903522483337$$
$$x_{2} = 31.4167228626928$$
$$x_{3} = 43.983093477052$$
$$x_{4} = -75.3974273593601$$
$$x_{5} = 21.9919449019234$$
$$x_{6} = 53.4078714378214$$
$$x_{7} = 15.7087595947439$$
$$x_{8} = 37.6999081698724$$
$$x_{9} = 72.2574273593601$$
$$x_{10} = 50.2662787842316$$
$$x_{11} = 194.779540849362$$
$$x_{12} = -28.2735375555132$$
$$x_{13} = -56.5478714378214$$
$$x_{14} = 94.2485759344887$$
$$x_{15} = -53.4062787842316$$
$$x_{16} = -40.8399081698724$$
$$x_{17} = -116.238131856027$$
$$x_{18} = 81.6822053201295$$
$$x_{19} = 65.9742420521806$$
$$x_{20} = -59.6894640914112$$
$$x_{21} = 56.5494640914112$$
$$x_{22} = -72.2558347057704$$
$$x_{23} = 91.1069832808989$$
$$x_{24} = -94.2469832808989$$
$$x_{25} = -43.9815008234622$$
$$x_{26} = 62.8326493985908$$
$$x_{27} = 12.5671669411541$$
$$x_{28} = 47.1246861306418$$
$$x_{29} = -50.2646861306418$$
$$x_{30} = -65.9726493985908$$
$$x_{31} = 69.1158347057704$$
$$x_{32} = 75.3990200129499$$
$$x_{33} = -87.9637979737193$$
$$x_{34} = -37.6983155162826$$
$$x_{35} = 34.5583155162826$$
$$x_{36} = -81.6806126665397$$
$$x_{37} = 40.8415008234622$$
$$x_{38} = 9.42557428756428$$
$$x_{39} = -18.8487595947439$$
$$x_{40} = 100.531761241668$$
$$x_{41} = -84.8222053201295$$
$$x_{42} = -78.5390200129499$$
$$x_{43} = 3.14238898038469$$
$$x_{44} = -91.1053906273091$$
$$x_{45} = 0.000796326794896619$$
$$x_{46} = 97.3901685880785$$
$$x_{47} = 6.28398163397448$$
$$x_{48} = 87.9653906273091$$
$$x_{49} = 59.691056745001$$
$$x_{50} = 25.1335375555132$$
$$x_{51} = -62.831056745001$$
$$x_{52} = -12.5655742875643$$
$$x_{53} = -3.1407963267949$$
$$x_{54} = -100.530168588078$$
$$x_{55} = -34.5567228626928$$
$$x_{56} = 78.5406126665397$$
$$x_{57} = -69.1142420521806$$
$$x_{58} = -31.415130209103$$
$$x_{59} = -6.28238898038469$$
$$x_{60} = 18.8503522483337$$
$$x_{61} = -15.7071669411541$$
$$x_{62} = 84.8237979737193$$
$$x_{63} = -9.42398163397448$$
$$x_{64} = 28.275130209103$$
$$x_{65} = -25.1319449019235$$
$$x_{66} = -47.123093477052$$
$$x_{67} = -97.3885759344887$$