El gráfico de la función cruce el eje T con f = 0
o sea hay que resolver la ecuación:
$$\frac{\sin{\left(t \right)}}{5} + \frac{\left(-1\right) 2 \cos{\left(t \right)}}{5} = 0$$
Resolvermos esta ecuaciónPuntos de cruce con el eje T:
Solución analítica$$t_{1} = \operatorname{atan}{\left(2 \right)}$$
Solución numérica$$t_{1} = 10.5319266785635$$
$$t_{2} = 98.4965209790777$$
$$t_{3} = 126.770854861386$$
$$t_{4} = -74.2910749683609$$
$$t_{5} = -96.2822235434895$$
$$t_{6} = 7.39033402497368$$
$$t_{7} = -52.2999263932324$$
$$t_{8} = 76.5053724039491$$
$$t_{9} = 92.2133356718981$$
$$t_{10} = -77.4326676219507$$
$$t_{11} = -86.8574455827201$$
$$t_{12} = -49.1583337396426$$
$$t_{13} = 70.2221870967695$$
$$t_{14} = -8.31762924297529$$
$$t_{15} = 51.3726311752308$$
$$t_{16} = -61.7247043540018$$
$$t_{17} = -71.1494823147711$$
$$t_{18} = -68.0078896611814$$
$$t_{19} = -36.5919631252834$$
$$t_{20} = 32.523075253692$$
$$t_{21} = -93.1406308898997$$
$$t_{22} = 4.24874137138388$$
$$t_{23} = 23.0982972929226$$
$$t_{24} = -2.0344439357957$$
$$t_{25} = 1.10714871779409$$
$$t_{26} = -30.3087778181038$$
$$t_{27} = 35.6646679072818$$
$$t_{28} = 57.6558164824104$$
$$t_{29} = 95.3549283254879$$
$$t_{30} = 45.0894458680512$$
$$t_{31} = -58.583111700412$$
$$t_{32} = -99.4238161970793$$
$$t_{33} = -33.4503704716936$$
$$t_{34} = -64.8662970075916$$
$$t_{35} = -46.0167410860528$$
$$t_{36} = -39.7335557788732$$
$$t_{37} = -42.875148432463$$
$$t_{38} = 54.5142238288206$$
$$t_{39} = -14.6008145501549$$
$$t_{40} = 82.7885577111287$$
$$t_{41} = 19.9567046393328$$
$$t_{42} = 38.8062605608716$$
$$t_{43} = -55.4415190468222$$
$$t_{44} = 16.8151119857431$$
$$t_{45} = 29.3814826001022$$
$$t_{46} = -11.4592218965651$$
$$t_{47} = 89.0717430183083$$
$$t_{48} = 85.9301503647185$$
$$t_{49} = -27.167185164514$$
$$t_{50} = 26.2398899465124$$
$$t_{51} = 60.7974091360002$$
$$t_{52} = 41.9478532144614$$
$$t_{53} = -20.8839998573345$$
$$t_{54} = 48.231038521641$$
$$t_{55} = 63.93900178959$$
$$t_{56} = 79.6469650575389$$
$$t_{57} = -80.5742602755405$$
$$t_{58} = 67.0805944431797$$
$$t_{59} = -24.0255925109243$$
$$t_{60} = 117.346076900616$$
$$t_{61} = 107.921298939847$$
$$t_{62} = -89.9990382363099$$
$$t_{63} = 13.6735193321533$$
$$t_{64} = -5.1760365893855$$
$$t_{65} = -17.7424072037447$$
$$t_{66} = 73.3637797503593$$
$$t_{67} = -83.7158529291303$$