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$$\left(\frac{\left(\tan^{2}{\left(x \right)} + 1\right) \sin{\left(x \right)}}{\tan{\left(x \right)}} + \log{\left(\tan{\left(x \right)} \right)} \cos{\left(x \right)}\right) \tan^{\sin{\left(x \right)}}{\left(x \right)} = 0$$
Resolvermos esta ecuaciónRaíces de esta ecuación
$$x_{1} = 3.46028220939344$$
$$x_{2} = -93.9290900518902$$
$$x_{3} = 12.8850601701628$$
$$x_{4} = 53.7257646668301$$
$$x_{5} = 63.1505426275995$$
$$x_{6} = 97.7080618170872$$
$$x_{7} = 88.2832838563179$$
$$x_{8} = 72.5753205883689$$
$$x_{9} = -71.9379414767616$$
$$x_{10} = 82.0000985491383$$
$$x_{11} = 41.159394052471$$
$$x_{12} = -31.0972369800943$$
$$x_{13} = -46.8052002480433$$
$$x_{14} = -87.6459047447106$$
$$x_{15} = -18.5308663657351$$
$$x_{16} = -37.3804222872739$$
$$x_{17} = -43.6636075944535$$
$$x_{18} = -9.10608840496574$$
$$x_{19} = 47.4425793596505$$
$$x_{20} = -78.2211267839412$$
$$x_{21} = -53.0883855552228$$
$$x_{22} = -15.3892737121453$$
$$x_{23} = -100.21227535907$$
$$x_{24} = 16.0266528237526$$
$$x_{25} = 66.2921352811893$$
$$x_{26} = -34.2388296336841$$
$$x_{27} = -40.5220149408637$$
$$x_{28} = 22.3098381309322$$
$$x_{29} = -5.96449575137594$$
$$x_{30} = 19.1682454773424$$
$$x_{31} = -49.946792901633$$
$$x_{32} = 44.3009867060607$$
$$x_{33} = -56.2299782088126$$
$$x_{34} = 69.4337279347791$$
$$x_{35} = -24.8140516729147$$
$$x_{36} = -27.9556443265045$$
$$x_{37} = -59.3715708624024$$
$$x_{38} = 9.74346751657302$$
$$x_{39} = 60.0089499740097$$
$$x_{40} = 25.451430784522$$
$$x_{41} = -97.07068270548$$
$$x_{42} = -62.5131635159922$$
$$x_{43} = -75.0795341303514$$
$$x_{44} = -12.2476810585555$$
$$x_{45} = -65.654756169582$$
$$x_{46} = 38.0178013988812$$
$$x_{47} = 85.1416912027281$$
$$x_{48} = -84.5043120911208$$
$$x_{49} = -90.7874973983004$$
$$x_{50} = 91.4248765099076$$
$$x_{51} = 75.7169132419587$$
$$x_{52} = -68.7963488231718$$
$$x_{53} = 34.8762087452914$$
$$x_{54} = -21.6724590193249$$
$$x_{55} = 31.7346160917016$$
$$x_{56} = -2.82290309778615$$
Signos de extremos en los puntos:
(3.4602822093934367, 1.41542505382344)
(-93.92909005189016, 0.706501553931617)
(12.885060170162816, 0.706501553931617)
(53.72576466683013, 1.41542505382344)
(63.150542627599506, 0.706501553931617)
(97.70806181708723, 1.41542505382344)
(88.28328385631785, 0.706501553931617)
(72.57532058836888, 1.41542505382344)
(-71.9379414767616, 1.41542505382344)
(82.00009854913827, 0.706501553931617)
(41.15939405247096, 1.41542505382344)
(-31.097236980094287, 0.706501553931617)
(-46.805200248043256, 1.41542505382344)
(-87.64590474471056, 0.706501553931617)
(-18.530866365735115, 0.706501553931617)
(-37.38042228727387, 0.706501553931617)
(-43.66360759445346, 0.706501553931617)
(-9.106088404965735, 1.41542505382344)
(47.442579359650544, 1.41542505382344)
(-78.22112678394119, 1.41542505382344)
(-53.08838555522284, 1.41542505382344)
(-15.389273712145323, 1.41542505382344)
(-100.21227535906974, 0.706501553931617)
(16.02665282375261, 1.41542505382344)
(66.2921352811893, 1.41542505382344)
(-34.238829633684084, 1.41542505382344)
(-40.52201494086367, 1.41542505382344)
(22.309838130932196, 1.41542505382344)
(-5.964495751375943, 0.706501553931617)
(19.168245477342403, 0.706501553931617)
(-49.946792901633046, 0.706501553931617)
(44.30098670606075, 0.706501553931617)
(-56.22997820881263, 0.706501553931617)
(69.4337279347791, 0.706501553931617)
(-24.8140516729147, 0.706501553931617)
(-27.955644326504494, 1.41542505382344)
(-59.37157086240243, 1.41542505382344)
(9.743467516573023, 1.41542505382344)
(60.00894997400972, 1.41542505382344)
(25.45143078452199, 0.706501553931617)
(-97.07068270547995, 1.41542505382344)
(-62.51316351599222, 0.706501553931617)
(-75.07953413035139, 0.706501553931617)
(-12.24768105855553, 0.706501553931617)
(-65.65475616958201, 1.41542505382344)
(38.01780139888116, 0.706501553931617)
(85.14169120272805, 1.41542505382344)
(-84.50431209112078, 1.41542505382344)
(-90.78749739830036, 1.41542505382344)
(91.42487650990765, 1.41542505382344)
(75.71691324195868, 0.706501553931617)
(-68.79634882317181, 0.706501553931617)
(34.87620874529137, 1.41542505382344)
(-21.672459019324908, 1.41542505382344)
(31.734616091701575, 0.706501553931617)
(-2.8229030977861496, 1.41542505382344)
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:
$$x_{1} = -93.9290900518902$$
$$x_{2} = 12.8850601701628$$
$$x_{3} = 63.1505426275995$$
$$x_{4} = 88.2832838563179$$
$$x_{5} = 82.0000985491383$$
$$x_{6} = -31.0972369800943$$
$$x_{7} = -87.6459047447106$$
$$x_{8} = -18.5308663657351$$
$$x_{9} = -37.3804222872739$$
$$x_{10} = -43.6636075944535$$
$$x_{11} = -100.21227535907$$
$$x_{12} = -5.96449575137594$$
$$x_{13} = 19.1682454773424$$
$$x_{14} = -49.946792901633$$
$$x_{15} = 44.3009867060607$$
$$x_{16} = -56.2299782088126$$
$$x_{17} = 69.4337279347791$$
$$x_{18} = -24.8140516729147$$
$$x_{19} = 25.451430784522$$
$$x_{20} = -62.5131635159922$$
$$x_{21} = -75.0795341303514$$
$$x_{22} = -12.2476810585555$$
$$x_{23} = 38.0178013988812$$
$$x_{24} = 75.7169132419587$$
$$x_{25} = -68.7963488231718$$
$$x_{26} = 31.7346160917016$$
Puntos máximos de la función:
$$x_{26} = 3.46028220939344$$
$$x_{26} = 53.7257646668301$$
$$x_{26} = 97.7080618170872$$
$$x_{26} = 72.5753205883689$$
$$x_{26} = -71.9379414767616$$
$$x_{26} = 41.159394052471$$
$$x_{26} = -46.8052002480433$$
$$x_{26} = -9.10608840496574$$
$$x_{26} = 47.4425793596505$$
$$x_{26} = -78.2211267839412$$
$$x_{26} = -53.0883855552228$$
$$x_{26} = -15.3892737121453$$
$$x_{26} = 16.0266528237526$$
$$x_{26} = 66.2921352811893$$
$$x_{26} = -34.2388296336841$$
$$x_{26} = -40.5220149408637$$
$$x_{26} = 22.3098381309322$$
$$x_{26} = -27.9556443265045$$
$$x_{26} = -59.3715708624024$$
$$x_{26} = 9.74346751657302$$
$$x_{26} = 60.0089499740097$$
$$x_{26} = -97.07068270548$$
$$x_{26} = -65.654756169582$$
$$x_{26} = 85.1416912027281$$
$$x_{26} = -84.5043120911208$$
$$x_{26} = -90.7874973983004$$
$$x_{26} = 91.4248765099076$$
$$x_{26} = 34.8762087452914$$
$$x_{26} = -21.6724590193249$$
$$x_{26} = -2.82290309778615$$
Decrece en los intervalos
$$\left[88.2832838563179, \infty\right)$$
Crece en los intervalos
$$\left(-\infty, -100.21227535907\right]$$