El gráfico de la función cruce el eje Z con f = 0
o sea hay que resolver la ecuación:
$$\sin{\left(2 z + \frac{\pi}{4} \right)} = 0$$
Resolvermos esta ecuaciónPuntos de cruce con el eje Z:
Solución analítica$$z_{1} = - \frac{\pi}{8}$$
$$z_{2} = \frac{3 \pi}{8}$$
Solución numérica$$z_{1} = -33.3794219443916$$
$$z_{2} = -99.3528676697772$$
$$z_{3} = 76.5763209312512$$
$$z_{4} = 90.7134878724053$$
$$z_{5} = 27.8816348006094$$
$$z_{6} = -184.175869316702$$
$$z_{7} = -66.3661448070844$$
$$z_{8} = -30.2378292908018$$
$$z_{9} = -19.2422550032375$$
$$z_{10} = 79.717913584841$$
$$z_{11} = -47.5165888855456$$
$$z_{12} = -52.2289778659303$$
$$z_{13} = -9.8174770424681$$
$$z_{14} = 10.6028752058656$$
$$z_{15} = 32.5940237809941$$
$$z_{16} = 42.0188017417635$$
$$z_{17} = 4.31968989868597$$
$$z_{18} = 56.1559686829176$$
$$z_{19} = -3.53429173528852$$
$$z_{20} = -67.9369411338793$$
$$z_{21} = 93.8550805259951$$
$$z_{22} = 54.5851723561227$$
$$z_{23} = -8.24668071567321$$
$$z_{24} = -89.9280897090078$$
$$z_{25} = 46.7311907221482$$
$$z_{26} = 12.1736715326604$$
$$z_{27} = -5389.79489631499$$
$$z_{28} = 92.2842841992002$$
$$z_{29} = 70.2931356240716$$
$$z_{30} = -96.2112750161874$$
$$z_{31} = 13.7444678594553$$
$$z_{32} = 48.3019870489431$$
$$z_{33} = -69.5077374606742$$
$$z_{34} = -1.96349540849362$$
$$z_{35} = -91.4988860358027$$
$$z_{36} = 71.8639319508665$$
$$z_{37} = -74.2201264410589$$
$$z_{38} = 49.872783375738$$
$$z_{39} = 65.5807466436869$$
$$z_{40} = -17.6714586764426$$
$$z_{41} = -77.3617190946487$$
$$z_{42} = 87.5718952188155$$
$$z_{43} = 64.009950316892$$
$$z_{44} = -0.392699081698724$$
$$z_{45} = -82.0741080750334$$
$$z_{46} = -16.1006623496477$$
$$z_{47} = 62.4391539900971$$
$$z_{48} = -60.0829594999048$$
$$z_{49} = -88.3572933822129$$
$$z_{50} = 2.74889357189107$$
$$z_{51} = -55.3705705195201$$
$$z_{52} = 84.4303025652257$$
$$z_{53} = -44.3749962319558$$
$$z_{54} = -97.7820713429823$$
$$z_{55} = -23.9546439836222$$
$$z_{56} = 57.7267650097125$$
$$z_{57} = -58.5121631731099$$
$$z_{58} = 35.7356164345839$$
$$z_{59} = 26.3108384738145$$
$$z_{60} = -75.7909227678538$$
$$z_{61} = 40.4480054149686$$
$$z_{62} = -31.8086256175967$$
$$z_{63} = 9.03207887907065$$
$$z_{64} = -53.7997741927252$$
$$z_{65} = -38.0918109247762$$
$$z_{66} = -39.6626072515711$$
$$z_{67} = 21.5984494934298$$
$$z_{68} = -25.5254403104171$$
$$z_{69} = -36.5210145979813$$
$$z_{70} = 34.164820107789$$
$$z_{71} = 18.45685683984$$
$$z_{72} = -83.6449044018282$$
$$z_{73} = 98.5674695063798$$
$$z_{74} = 86.0010988920206$$
$$z_{75} = -45.9457925587507$$
$$z_{76} = 20.0276531666349$$
$$z_{77} = 43.5895980685584$$
$$z_{78} = 5.89048622548086$$
$$z_{79} = -22.3838476568273$$
$$z_{80} = -11.388273369263$$
$$z_{81} = 68.7223392972767$$
$$z_{82} = -80.5033117482384$$
$$z_{83} = -41.233403578366$$
$$z_{84} = -61.6537558266997$$
$$z_{85} = 24.7400421470196$$
$$z_{86} = 100.138265833175$$
$$z_{87} = 78.1471172580461$$