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$$\frac{1 - \cos{\left(x \right)}}{x - \tan{\left(x \right)}} + \frac{\left(x - \sin{\left(x \right)}\right) \tan^{2}{\left(x \right)}}{\left(x - \tan{\left(x \right)}\right)^{2}} = 0$$
Resolvermos esta ecuaciónRaíces de esta ecuación
$$x_{1} = -100.530964510497$$
$$x_{2} = -69.1150357337256$$
$$x_{3} = 69.1150388446184$$
$$x_{4} = 81.6814088654407$$
$$x_{5} = -18.8495569354352$$
$$x_{6} = 87.9645891530623$$
$$x_{7} = 69.1150394922452$$
$$x_{8} = -113.097336299759$$
$$x_{9} = 81.6814098425437$$
$$x_{10} = -12.5663701840803$$
$$x_{11} = 69.1150375367013$$
$$x_{12} = -87.9645952173239$$
$$x_{13} = -75.3982239004993$$
$$x_{14} = 100.530964745716$$
$$x_{15} = -31.4159267356987$$
$$x_{16} = 37.6991120578079$$
$$x_{17} = 43.9822971695403$$
$$x_{18} = 56.5486675846956$$
$$x_{19} = 62.8318526729861$$
$$x_{20} = 100.530967590802$$
$$x_{21} = 62.8318524178403$$
$$x_{22} = 25.1327403665251$$
$$x_{23} = -31.4159267389468$$
$$x_{24} = -6.28318510764535$$
$$x_{25} = -94.2477794289072$$
$$x_{26} = 43.9822973069874$$
$$x_{27} = 50.2654824463231$$
$$x_{28} = -25.1327385834705$$
$$x_{29} = 87.9645878964094$$
$$x_{30} = 94.2477796093521$$
$$x_{31} = 113.097338200433$$
$$x_{32} = 31.4159270078848$$
$$x_{33} = -100.530967397304$$
$$x_{34} = 62.8318570545501$$
$$x_{35} = -62.8318521668007$$
$$x_{36} = 43.9822977582334$$
$$x_{37} = -6.28318468774868$$
$$x_{38} = -50.2654822672451$$
$$x_{39} = -307.876075235129$$
$$x_{40} = -81.6814090386714$$
$$x_{41} = 75.3982213478593$$
$$x_{42} = -56.5486673426872$$
$$x_{43} = -56.5486711735805$$
$$x_{44} = -87.9645943583029$$
$$x_{45} = 37.6991118536214$$
$$x_{46} = -18.8495550098077$$
$$x_{47} = -62.8318540980733$$
$$x_{48} = -25.1327416744928$$
$$x_{49} = 31.4159241387587$$
$$x_{50} = 131.946894970856$$
$$x_{51} = 81.6814030257389$$
$$x_{52} = -43.9822971744607$$
$$x_{53} = -69.1150388409748$$
$$x_{54} = -257.610598459672$$
$$x_{55} = 50.2654824337184$$
$$x_{56} = -75.3982240263278$$
$$x_{57} = 37.6991063433335$$
$$x_{58} = 43.9822972992366$$
$$x_{59} = -100.530968216638$$
$$x_{60} = 87.9645943362011$$
$$x_{61} = -37.6991118774875$$
$$x_{62} = 31.4159314451446$$
$$x_{63} = 6.28318528412783$$
$$x_{64} = 25.1327423142362$$
$$x_{65} = 18.8495555101384$$
$$x_{66} = 12.5663704242683$$
$$x_{67} = 75.3982241765023$$
$$x_{68} = 81.68140922005$$
Signos de extremos en los puntos:
(-100.53096451049653, 1)
(-69.11503573372556, 1)
(69.11503884461837, 1)
(81.68140886544074, 1)
(-18.84955693543524, 1)
(87.96458915306229, 1)
(69.11503949224522, 1)
(-113.09733629975894, 1)
(81.68140984254372, 1)
(-12.566370184080304, 1)
(69.11503753670127, 1)
(-87.96459521732386, 1)
(-75.3982239004993, 1)
(100.53096474571626, 1)
(-31.415926735698708, 1)
(37.699112057807874, 1)
(43.98229716954028, 1)
(56.54866758469556, 1)
(62.83185267298607, 1)
(100.53096759080243, 1)
(62.83185241784028, 1)
(25.132740366525116, 1)
(-31.415926738946762, 1)
(-6.283185107645348, 1)
(-94.24777942890718, 1)
(43.98229730698741, 1)
(50.265482446323084, 1)
(-25.132738583470527, 1)
(87.96458789640938, 1)
(94.24777960935205, 1)
(113.09733820043321, 1)
(31.41592700788479, 1)
(-100.53096739730367, 1)
(62.83185705455009, 1)
(-62.83185216680066, 1)
(43.98229775823344, 1)
(-6.283184687748678, 1)
(-50.265482267245105, 1)
(-307.8760752351294, 1)
(-81.68140903867145, 1)
(75.39822134785933, 1)
(-56.54866734268718, 1)
(-56.548671173580495, 1)
(-87.96459435830292, 1)
(37.69911185362138, 1)
(-18.849555009807688, 1)
(-62.8318540980733, 1)
(-25.132741674492816, 1)
(31.415924138758655, 1)
(131.94689497085557, 1)
(81.68140302573893, 1)
(-43.982297174460705, 1)
(-69.11503884097485, 1)
(-257.610598459672, 1)
(50.26548243371841, 1)
(-75.39822402632784, 1)
(37.69910634333351, 1)
(43.98229729923656, 1)
(-100.53096821663816, 1)
(87.96459433620113, 1)
(-37.69911187748746, 1)
(31.415931445144572, 1)
(6.283185284127832, 1)
(25.13274231423616, 1)
(18.849555510138448, 1)
(12.5663704242683, 1)
(75.39822417650228, 1)
(81.68140922004997, 1)
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:
La función no tiene puntos mínimos
La función no tiene puntos máximos
No cambia el valor en todo el eje numérico