Para hallar los extremos hay que resolver la ecuación
$$\frac{d}{d x} f{\left(x \right)} = 0$$
(la derivada es igual a cero),
y las raíces de esta ecuación serán los extremos de esta función:
$$\frac{d}{d x} f{\left(x \right)} = $$
primera derivada$$- \left(- \frac{e^{x} \cos{\left(x \right)}}{2} + \left(\frac{e^{x} \sin{\left(x \right)}}{2} - 1\right)\right) e^{- x} + \sin{\left(x \right)} = 0$$
Resolvermos esta ecuaciónRaíces de esta ecuación
$$x_{1} = 93.4623814442964$$
$$x_{2} = 90.3207887907066$$
$$x_{3} = 43.1968989868597$$
$$x_{4} = 18.0641577379413$$
$$x_{5} = 21.205750412604$$
$$x_{6} = 2.47544807120502$$
$$x_{7} = 71.4712328691678$$
$$x_{8} = 24.3473430652832$$
$$x_{9} = 74.6128255227576$$
$$x_{10} = 40.0553063332699$$
$$x_{11} = 84.037603483527$$
$$x_{12} = 96.6039740978861$$
$$x_{13} = 68.329640215578$$
$$x_{14} = 65.1880475619882$$
$$x_{15} = 8.63963004579403$$
$$x_{16} = 80.8960108299372$$
$$x_{17} = 14.9225655719929$$
$$x_{18} = 11.7809616339234$$
$$x_{19} = 30.6305283725004$$
$$x_{20} = 36.9137136796801$$
$$x_{21} = 27.4889357189123$$
$$x_{22} = 49.4800842940392$$
$$x_{23} = 62.0464549083984$$
$$x_{24} = 46.3384916404494$$
$$x_{25} = 52.621676947629$$
$$x_{26} = 99.7455667514759$$
$$x_{27} = 58.9048622548086$$
$$x_{28} = 5.49196089340523$$
$$x_{29} = 33.7721210260903$$
$$x_{30} = 55.7632696012188$$
$$x_{31} = 77.7544181763474$$
$$x_{32} = 87.1791961371168$$
Signos de extremos en los puntos:
(93.46238144429635, -0.707106781186548)
(90.32078879070656, 0.707106781186548)
(43.19689898685966, -0.707106781186547)
(18.06415773794133, -0.707106795470091)
(21.205750412604026, 0.7071067805693)
(2.475448071205018, 0.617959419427042)
(71.47123286916779, 0.707106781186547)
(24.347343065283177, -0.707106781213221)
(74.61282552275759, -0.707106781186547)
(40.05530633326986, 0.707106781186547)
(84.03760348352696, 0.707106781186548)
(96.60397409788614, 0.707106781186547)
(68.329640215578, -0.707106781186548)
(65.18804756198821, 0.707106781186547)
(8.639630045794034, 0.706929806691121)
(80.89601082993718, -0.707106781186548)
(14.922565571992854, 0.707106450655532)
(11.780961633923392, -0.707114429946336)
(30.630528372500414, -0.707106781186597)
(36.91371367968007, -0.707106781186548)
(27.48893571891232, 0.707106781185395)
(49.480084294039244, -0.707106781186548)
(62.04645490839842, -0.707106781186547)
(46.33849164044945, 0.707106781186547)
(52.621676947629034, 0.707106781186548)
(99.74556675147593, -0.707106781186547)
(58.90486225480862, 0.707106781186548)
(5.491960893405234, -0.711214537624901)
(33.77212102609028, 0.707106781186545)
(55.76326960121883, -0.707106781186548)
(77.75441817634739, 0.707106781186548)
(87.17919613711676, -0.707106781186547)
Intervalos de crecimiento y decrecimiento de la función:Hallemos los intervalos donde la función crece y decrece y también los puntos mínimos y máximos de la función, para lo cual miramos cómo se comporta la función en los extremos con desviación mínima del extremo:
Puntos mínimos de la función:
$$x_{1} = 93.4623814442964$$
$$x_{2} = 43.1968989868597$$
$$x_{3} = 18.0641577379413$$
$$x_{4} = 24.3473430652832$$
$$x_{5} = 74.6128255227576$$
$$x_{6} = 68.329640215578$$
$$x_{7} = 80.8960108299372$$
$$x_{8} = 11.7809616339234$$
$$x_{9} = 30.6305283725004$$
$$x_{10} = 36.9137136796801$$
$$x_{11} = 49.4800842940392$$
$$x_{12} = 62.0464549083984$$
$$x_{13} = 99.7455667514759$$
$$x_{14} = 5.49196089340523$$
$$x_{15} = 55.7632696012188$$
$$x_{16} = 87.1791961371168$$
Puntos máximos de la función:
$$x_{16} = 90.3207887907066$$
$$x_{16} = 21.205750412604$$
$$x_{16} = 2.47544807120502$$
$$x_{16} = 71.4712328691678$$
$$x_{16} = 40.0553063332699$$
$$x_{16} = 84.037603483527$$
$$x_{16} = 96.6039740978861$$
$$x_{16} = 65.1880475619882$$
$$x_{16} = 8.63963004579403$$
$$x_{16} = 14.9225655719929$$
$$x_{16} = 27.4889357189123$$
$$x_{16} = 46.3384916404494$$
$$x_{16} = 52.621676947629$$
$$x_{16} = 58.9048622548086$$
$$x_{16} = 33.7721210260903$$
$$x_{16} = 77.7544181763474$$
Decrece en los intervalos
$$\left[99.7455667514759, \infty\right)$$
Crece en los intervalos
$$\left(-\infty, 5.49196089340523\right]$$