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$$- 2 \sin{\left(x \right)} \left|{\cos{\left(x \right)}}\right| + 2 \cos{\left(x \right)} \left|{\sin{\left(x \right)}}\right| = 0$$
Resolvermos esta ecuaciónRaíces de esta ecuación
$$x_{1} = 85.6233696319782$$
$$x_{2} = 66$$
$$x_{3} = -31.234571006245$$
$$x_{4} = 98$$
$$x_{5} = -58.1354410675642$$
$$x_{6} = -24$$
$$x_{7} = -46$$
$$x_{8} = 22$$
$$x_{9} = -74$$
$$x_{10} = 64$$
$$x_{11} = -21.75$$
$$x_{12} = 36$$
$$x_{13} = 56.6792735086239$$
$$x_{14} = 51.8060555240722$$
$$x_{15} = -8$$
$$x_{16} = -2$$
$$x_{17} = 86$$
$$x_{18} = -81.6753830585147$$
$$x_{19} = -64.7389972250886$$
$$x_{20} = 0.815963668261716$$
$$x_{21} = 42$$
$$x_{22} = -80.1244245561668$$
$$x_{23} = -18$$
$$x_{24} = -75.1852705444511$$
$$x_{25} = 73.7935652883146$$
$$x_{26} = -77.1220108719966$$
$$x_{27} = -64.8876357947581$$
$$x_{28} = 72.2569395086773$$
$$x_{29} = -40.7475426173107$$
$$x_{30} = -37.6953179870105$$
$$x_{31} = 22.1281485034953$$
$$x_{32} = 29.8182608971954$$
$$x_{33} = -20.8151070724778$$
$$x_{34} = 38$$
$$x_{35} = 42.1996061034036$$
$$x_{36} = -14.1581158829323$$
$$x_{37} = -84$$
$$x_{38} = 10$$
$$x_{39} = -28$$
$$x_{40} = 14$$
$$x_{41} = -72$$
$$x_{42} = 45.0490290950343$$
$$x_{43} = 0$$
$$x_{44} = -42.7758123652672$$
$$x_{45} = 12.720495165641$$
$$x_{46} = 54$$
$$x_{47} = -52$$
$$x_{48} = -12$$
$$x_{49} = -59.6854188636277$$
$$x_{50} = 32$$
$$x_{51} = -53.21051316578$$
$$x_{52} = -36.1466670839032$$
$$x_{53} = -40$$
$$x_{54} = -86.7044131211503$$
$$x_{55} = 44$$
$$x_{56} = 63.6707650442113$$
$$x_{57} = -6$$
$$x_{58} = -50$$
$$x_{59} = 16$$
$$x_{60} = -78$$
$$x_{61} = -9.25753963078497$$
$$x_{62} = -65.75$$
$$x_{63} = 4$$
$$x_{64} = -56$$
$$x_{65} = 78.6598841410821$$
$$x_{66} = -34$$
$$x_{67} = 28.2757180710112$$
$$x_{68} = -62$$
$$x_{69} = -15.7050892844756$$
$$x_{70} = 100.641230697572$$
$$x_{71} = -97.1587363628829$$
$$x_{72} = -18.8136202642423$$
$$x_{73} = -68$$
$$x_{74} = 95.7807719870693$$
$$x_{75} = 76$$
$$x_{76} = -94$$
$$x_{77} = 66.996445860184$$
$$x_{78} = -43.75$$
$$x_{79} = -96$$
$$x_{80} = 82$$
$$x_{81} = 6.28525877373941$$
$$x_{82} = 88.9393875730149$$
$$x_{83} = 7.83019844012797$$
$$x_{84} = 34.6994561309022$$
$$x_{85} = -30$$
$$x_{86} = 48$$
$$x_{87} = 20$$
$$x_{88} = 58$$
$$x_{89} = -87.75$$
$$x_{90} = 70$$
$$x_{91} = 23.0976732112262$$
$$x_{92} = 60$$
$$x_{93} = 50.2662808147101$$
$$x_{94} = -90$$
$$x_{95} = 92$$
$$x_{96} = 88$$
$$x_{97} = 1.1428321394192$$
$$x_{98} = 94.25$$
$$x_{99} = -100$$
$$x_{100} = 80$$
$$x_{101} = 26$$
Signos de extremos en los puntos:
(85.62336963197819, -1)
(66, -1)
(-31.234571006244988, 1)
(98, -1)
(-58.135441067564244, -1)
(-24, 1)
(-46, -1)
(22, -1)
(-74, 1)
(64, 1)
(-21.75, -1)
(36, -1)
(56.679273508623886, 1)
(51.806055524072164, 1)
(-8, -1)
(-2, -1)
(86, -1)
(-81.67538305851468, 1)
(-64.73899722508855, -1)
(0.8159636682617161, 1)
(42, -1)
(-80.12442455616677, 1)
(-18, 1)
(-75.18527054445106, 1)
(73.79356528831458, -1)
(-77.1220108719966, -1)
(-64.88763579475807, -1)
(72.2569395086773, -1)
(-40.747542617310664, -1)
(-37.69531798701046, 1)
(22.128148503495254, -1)
(29.818260897195415, -1)
(-20.81510707247777, -1)
(38, 1)
(42.199606103403646, -1)
(-14.158115882932258, -1)
(-84, -1)
(10, -1)
(-28, -1)
(14, 1)
(-72, -1)
(45.04902909503426, 1)
(0, 1)
(-42.77581236526724, 1)
(12.720495165641042, 1)
(54, -1)
(-52, -1)
(-12, 1)
(-59.68541886362766, -1)
(32, 1)
(-53.210513165779965, -1)
(-36.14666708390321, 1)
(-40, -1)
(-86.70441312115032, 1)
(44, 1)
(63.670765044211265, 1)
(-6, 1)
(-50, 1)
(16, -1)
(-78, -1)
(-9.257539630784969, -1)
(-65.75, -1)
(4, -1)
(-56, 1)
(78.65988414108214, -1)
(-34, -1)
(28.275718071011216, -1)
(-62, 1)
(-15.705089284475568, -1)
(100.64123069757201, 1)
(-97.1587363628829, -1)
(-18.81362026424233, 1)
(-68, 1)
(95.7807719870693, 1)
(76, 1)
(-94, 1)
(66.99644586018401, -1)
(-43.75, 1)
(-96, -1)
(82, 1)
(6.2852587737394146, 1)
(88.93938757301494, 1)
(7.830198440127966, 1)
(34.69945613090222, -1)
(-30, 1)
(48, -1)
(20, 1)
(58, 1)
(-87.75, 1)
(70, 1)
(23.097673211226223, -1)
(60, -1)
(50.26628081471005, 1)
(-90, -1)
(92, -1)
(88, 1)
(1.1428321394191958, 1)
(94.25, 1)
(-100, 1)
(80, -1)
(26, 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:
Puntos mínimos de la función:
$$x_{1} = 64$$
$$x_{2} = 42$$
$$x_{3} = -75.1852705444511$$
$$x_{4} = 73.7935652883146$$
$$x_{5} = 45.0490290950343$$
$$x_{6} = 12.720495165641$$
$$x_{7} = 63.6707650442113$$
$$x_{8} = 82$$
$$x_{9} = -100$$
Puntos máximos de la función:
$$x_{9} = 56.6792735086239$$
$$x_{9} = 22.1281485034953$$
$$x_{9} = 0$$
$$x_{9} = -42.7758123652672$$
$$x_{9} = -86.7044131211503$$
$$x_{9} = -50$$
$$x_{9} = -15.7050892844756$$
$$x_{9} = 92$$
Decrece en los intervalos
$$\left[82, \infty\right)$$
Crece en los intervalos
$$\left(-\infty, -100\right]$$