El gráfico de la función cruce el eje X con f = 0
o sea hay que resolver la ecuación:
$$\sin{\left(\sqrt{5} x \right)} + \cos{\left(\sqrt{5} x \right)} = 0$$
Resolvermos esta ecuaciónPuntos de cruce con el eje X:
Solución analítica$$x_{1} = - \frac{\sqrt{5} \pi}{20}$$
Solución numérica$$x_{1} = 69.8969065738552$$
$$x_{2} = -76.2192398317919$$
$$x_{3} = -48.119980907629$$
$$x_{4} = 96.59120255181$$
$$x_{5} = 40.3926847034842$$
$$x_{6} = 26.3430552414027$$
$$x_{7} = 46.0125364883168$$
$$x_{8} = 13.6983887255294$$
$$x_{9} = -5.97109252138462$$
$$x_{10} = -11.5909443062172$$
$$x_{11} = 100.806091390434$$
$$x_{12} = -77.624202778$$
$$x_{13} = 109.235869067683$$
$$x_{14} = 74.1117954124797$$
$$x_{15} = 89.5663878207693$$
$$x_{16} = 88.1614248745611$$
$$x_{17} = 37.5827588110679$$
$$x_{18} = 22.1281664027783$$
$$x_{19} = -66.3844992083349$$
$$x_{20} = 31.9629070262353$$
$$x_{21} = -91.6738322400815$$
$$x_{22} = 76.921721304896$$
$$x_{23} = 68.4919436276471$$
$$x_{24} = -57.954721531086$$
$$x_{25} = 16.5083146179457$$
$$x_{26} = 60.0621659503982$$
$$x_{27} = -15.8058331448416$$
$$x_{28} = -72.0043509931674$$
$$x_{29} = 93.7812766593937$$
$$x_{30} = -20.0207219834661$$
$$x_{31} = 8.07853694069684$$
$$x_{32} = -34.0703514455475$$
$$x_{33} = 41.7976476496923$$
$$x_{34} = -59.3596844772941$$
$$x_{35} = -29.8554626069231$$
$$x_{36} = 27.7480181876109$$
$$x_{37} = 83.9465360359367$$
$$x_{38} = -90.2688692938733$$
$$x_{39} = 51.6323882731493$$
$$x_{40} = -7.37605546759276$$
$$x_{41} = 79.7316471973122$$
$$x_{42} = 50.2274253269412$$
$$x_{43} = 12.2934257793213$$
$$x_{44} = -45.3100550152127$$
$$x_{45} = -73.4093139393756$$
$$x_{46} = -49.5249438538371$$
$$x_{47} = -28.4504996607149$$
$$x_{48} = -53.7398326924616$$
$$x_{49} = 97.9961654980181$$
$$x_{50} = -52.3348697462534$$
$$x_{51} = 23.5331293489864$$
$$x_{52} = -39.6902032303801$$
$$x_{53} = -1.75620368276018$$
$$x_{54} = -43.9050920690045$$
$$x_{55} = 6.67357399448869$$
$$x_{56} = -63.5745733159186$$
$$x_{57} = 3.8636481020724$$
$$x_{58} = -95.8887210787059$$
$$x_{59} = -100.10360991733$$
$$x_{60} = 44.6075735421086$$
$$x_{61} = -38.285240284172$$
$$x_{62} = -80.4341286704163$$
$$x_{63} = 92.3763137131856$$
$$x_{64} = -62.1696103697104$$
$$x_{65} = 82.5415730897285$$
$$x_{66} = -86.0539804552489$$
$$x_{67} = 36.1777958648597$$
$$x_{68} = -35.4753143917557$$
$$x_{69} = -21.4256849296742$$
$$x_{70} = -87.458943401457$$
$$x_{71} = 64.2770547890226$$
$$x_{72} = 55.8472771117738$$
$$x_{73} = 58.6572030041901$$
$$x_{74} = 65.6820177352308$$
$$x_{75} = -25.6405737682987$$
$$x_{76} = 17.9132775641539$$
$$x_{77} = -14.4008701986335$$
$$x_{78} = 7429.09281881212$$
$$x_{79} = 30.5579440800272$$
$$x_{80} = 78.3266842511041$$
$$x_{81} = 2.45868515586425$$
$$x_{82} = -67.789462154543$$
$$x_{83} = 54.4423141655656$$
$$x_{84} = -10.1859813600091$$
$$x_{85} = 110.640832013891$$
$$x_{86} = -24.2356108220905$$
$$x_{87} = -81.8390916166245$$
$$x_{88} = -0.351240736552036$$