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$$2 \cos{\left(2 \left(\left|{x}\right| - \frac{\sqrt{2}}{2}\right) - \frac{1}{2} \right)} \operatorname{sign}{\left(x \right)} = 0$$
Resolvermos esta ecuaciónRaíces de esta ecuación
$$x_{1} = -91.2778955718931$$
$$x_{2} = 78.7115249575339$$
$$x_{3} = -8.02569025176358$$
$$x_{4} = 3.31330127137889$$
$$x_{5} = -50.4371910752258$$
$$x_{6} = -67.7159506699697$$
$$x_{7} = 80.2823212843288$$
$$x_{8} = 66.1451543431748$$
$$x_{9} = -52.0079874020207$$
$$x_{10} = -73.9991359771492$$
$$x_{11} = -66.1451543431748$$
$$x_{12} = 55.1495800556105$$
$$x_{13} = 64.5743580163799$$
$$x_{14} = -89.7070992450982$$
$$x_{15} = -97.5610808790727$$
$$x_{16} = 14.3088755589432$$
$$x_{17} = 42.5832094412513$$
$$x_{18} = 22.1628571929177$$
$$x_{19} = 58.2911727092003$$
$$x_{20} = 97.5610808790727$$
$$x_{21} = 72.4283396503543$$
$$x_{22} = 23.7336535197125$$
$$x_{23} = 86.5655065915084$$
$$x_{24} = 81.8531176111237$$
$$x_{25} = -31.587635153687$$
$$x_{26} = -22.1628571929177$$
$$x_{27} = 88.1363029183033$$
$$x_{28} = 0$$
$$x_{29} = -69.2867469967645$$
$$x_{30} = 30.0168388268921$$
$$x_{31} = 73.9991359771492$$
$$x_{32} = 59.8619690359952$$
$$x_{33} = 9.59648657855848$$
$$x_{34} = -53.5787837288156$$
$$x_{35} = -81.8531176111237$$
$$x_{36} = 8.02569025176358$$
$$x_{37} = -15.8796718857381$$
$$x_{38} = -45.7248020948411$$
$$x_{39} = -75.5699323039441$$
$$x_{40} = -25.3044498465074$$
$$x_{41} = 45.7248020948411$$
$$x_{42} = -1.742504944584$$
$$x_{43} = -58.2911727092003$$
$$x_{44} = -39.4416167876615$$
$$x_{45} = 12.7380792321483$$
$$x_{46} = -6.45489392496869$$
$$x_{47} = -273.490269480101$$
$$x_{48} = 95.9902845522778$$
$$x_{49} = 36.3000241340717$$
$$x_{50} = -72.4283396503543$$
$$x_{51} = 75.5699323039441$$
$$x_{52} = -760.437130786519$$
$$x_{53} = -83.4239139379186$$
$$x_{54} = -44.1540057680462$$
$$x_{55} = 67.7159506699697$$
$$x_{56} = -61.4327653627901$$
$$x_{57} = 94.4194882254829$$
$$x_{58} = 52.0079874020207$$
$$x_{59} = 15.8796718857381$$
$$x_{60} = -94.4194882254829$$
$$x_{61} = -9.59648657855848$$
$$x_{62} = 56.7203763824054$$
$$x_{63} = 37.8708204608666$$
$$x_{64} = -80.2823212843288$$
$$x_{65} = 1.742504944584$$
$$x_{66} = -47.295598421636$$
$$x_{67} = -88.1363029183033$$
$$x_{68} = -116.410636800611$$
$$x_{69} = -59.8619690359952$$
$$x_{70} = 89.7070992450982$$
$$x_{71} = -23634.3732415738$$
$$x_{72} = -30.0168388268921$$
$$x_{73} = 6.45489392496869$$
$$x_{74} = -23.7336535197125$$
$$x_{75} = 100.702673532662$$
$$x_{76} = -17.450468212533$$
$$x_{77} = 50.4371910752258$$
$$x_{78} = 28.4460425000972$$
$$x_{79} = -28.4460425000972$$
$$x_{80} = -14.3088755589432$$
$$x_{81} = 20.5920608661228$$
$$x_{82} = 44.1540057680462$$
$$x_{83} = -3.31330127137889$$
$$x_{84} = -36.3000241340717$$
$$x_{85} = 53.5787837288156$$
$$x_{86} = 34.7292278072768$$
$$x_{87} = -26.8752461733023$$
$$x_{88} = -37.8708204608666$$
$$x_{89} = 31.587635153687$$
$$x_{90} = -95.9902845522778$$
Signos de extremos en los puntos:
/ ___\
| 2*\/ 2 |
(-91.2778955718931, sin|182.055791143786 - -------|)
\ 2 /
/ ___\
| 2*\/ 2 |
(78.71152495753392, sin|156.923049915068 - -------|)
\ 2 /
/ ___\
| 2*\/ 2 |
(-8.025690251763582, sin|15.5513805035272 - -------|)
\ 2 /
/ ___\
| 2*\/ 2 |
(3.3133012713788923, sin|6.12660254275778 - -------|)
\ 2 /
/ ___\
| 2*\/ 2 |
(-50.43719107522579, sin|100.374382150452 - -------|)
\ 2 /
/ ___\
| 2*\/ 2 |
(-67.71595066996966, sin|134.931901339939 - -------|)
\ 2 /
/ ___\
| 2*\/ 2 |
(80.28232128432883, sin|160.064642568658 - -------|)
\ 2 /
/ ___\
| 2*\/ 2 |
(66.14515434317475, sin|131.79030868635 - -------|)
\ 2 /
/ ___\
| 2*\/ 2 |
(-52.00798740202069, sin|103.515974804041 - -------|)
\ 2 /
/ ___\
| 2*\/ 2 |
(-73.99913597714924, sin|147.498271954298 - -------|)
\ 2 /
/ ___\
| 2*\/ 2 |
(-66.14515434317475, sin|131.79030868635 - -------|)
\ 2 /
/ ___\
| 2*\/ 2 |
(55.14958005561048, sin|109.799160111221 - -------|)
\ 2 /
/ ___\
| 2*\/ 2 |
(64.57435801637986, sin|128.64871603276 - -------|)
\ 2 /
/ ___\
| 2*\/ 2 |
(-89.7070992450982, sin|178.914198490196 - -------|)
\ 2 /
/ ___\
| 2*\/ 2 |
(-97.56108087907269, sin|194.622161758145 - -------|)
\ 2 /
/ ___\
| 2*\/ 2 |
(14.30887555894317, sin|28.1177511178863 - -------|)
\ 2 /
/ ___\
| 2*\/ 2 |
(42.583209441251306, sin|84.6664188825026 - -------|)
\ 2 /
/ ___\
| 2*\/ 2 |
(22.162857192917652, sin|43.8257143858353 - -------|)
\ 2 /
/ ___\
| 2*\/ 2 |
(58.291172709200275, sin|116.082345418401 - -------|)
\ 2 /
/ ___\
| 2*\/ 2 |
(97.56108087907269, sin|194.622161758145 - -------|)
\ 2 /
/ ___\
| 2*\/ 2 |
(72.42833965035435, sin|144.356679300709 - -------|)
\ 2 /
/ ___\
| 2*\/ 2 |
(23.733653519712547, sin|46.9673070394251 - -------|)
\ 2 /
/ ___\
| 2*\/ 2 |
(86.56550659150841, sin|172.631013183017 - -------|)
\ 2 /
/ ___\
| 2*\/ 2 |
(81.85311761112372, sin|163.206235222247 - -------|)
\ 2 /
/ ___\
| 2*\/ 2 |
(-31.58763515368703, sin|62.6752703073741 - -------|)
\ 2 /
/ ___\
| 2*\/ 2 |
(-22.162857192917652, sin|43.8257143858353 - -------|)
\ 2 /
/ ___\
| 2*\/ 2 |
(88.13630291830331, sin|175.772605836607 - -------|)
\ 2 /
/1 ___\
(0, -sin|- + \/ 2 |)
\2 /
/ ___\
| 2*\/ 2 |
(-69.28674699676455, sin|138.073493993529 - -------|)
\ 2 /
/ ___\
| 2*\/ 2 |
(30.016838826892133, sin|59.5336776537843 - -------|)
\ 2 /
/ ___\
| 2*\/ 2 |
(73.99913597714924, sin|147.498271954298 - -------|)
\ 2 /
/ ___\
| 2*\/ 2 |
(59.86196903599517, sin|119.22393807199 - -------|)
\ 2 /
/ ___\
| 2*\/ 2 |
(9.596486578558478, sin|18.692973157117 - -------|)
\ 2 /
/ ___\
| 2*\/ 2 |
(-53.57878372881559, sin|106.657567457631 - -------|)
\ 2 /
/ ___\
| 2*\/ 2 |
(-81.85311761112372, sin|163.206235222247 - -------|)
\ 2 /
/ ___\
| 2*\/ 2 |
(8.025690251763582, sin|15.5513805035272 - -------|)
\ 2 /
/ ___\
| 2*\/ 2 |
(-15.879671885738066, sin|31.2593437714761 - -------|)
\ 2 /
/ ___\
| 2*\/ 2 |
(-45.7248020948411, sin|90.9496041896822 - -------|)
\ 2 /
/ ___\
| 2*\/ 2 |
(-75.56993230394414, sin|150.639864607888 - -------|)
\ 2 /
/ ___\
| 2*\/ 2 |
(-25.304449846507445, sin|50.1088996930149 - -------|)
\ 2 /
/ ___\
| 2*\/ 2 |
(45.7248020948411, sin|90.9496041896822 - -------|)
\ 2 /
/ ___\
| 2*\/ 2 |
(-1.7425049445839957, sin|2.98500988916799 - -------|)
\ 2 /
/ ___\
| 2*\/ 2 |
(-58.291172709200275, sin|116.082345418401 - -------|)
\ 2 /
/ ___\
| 2*\/ 2 |
(-39.441616787661516, sin|78.383233575323 - -------|)
\ 2 /
/ ___\
| 2*\/ 2 |
(12.738079232148273, sin|24.9761584642965 - -------|)
\ 2 /
/ ___\
| 2*\/ 2 |
(-6.454893924968686, sin|12.4097878499374 - -------|)
\ 2 /
/ ___\
| 2*\/ 2 |
(-273.4902694801011, sin|546.480538960202 - -------|)
\ 2 /
/ ___\
| 2*\/ 2 |
(95.9902845522778, sin|191.480569104556 - -------|)
\ 2 /
/ ___\
| 2*\/ 2 |
(36.30002413407172, sin|72.1000482681434 - -------|)
\ 2 /
/ ___\
| 2*\/ 2 |
(-72.42833965035435, sin|144.356679300709 - -------|)
\ 2 /
/ ___\
| 2*\/ 2 |
(75.56993230394414, sin|150.639864607888 - -------|)
\ 2 /
/ ___\
| 2*\/ 2 |
(-760.4371307865191, sin|1520.37426157304 - -------|)
\ 2 /
/ ___\
| 2*\/ 2 |
(-83.42391393791863, sin|166.347827875837 - -------|)
\ 2 /
/ ___\
| 2*\/ 2 |
(-44.154005768046204, sin|87.8080115360924 - -------|)
\ 2 /
/ ___\
| 2*\/ 2 |
(67.71595066996966, sin|134.931901339939 - -------|)
\ 2 /
/ ___\
| 2*\/ 2 |
(-61.432765362790065, sin|122.36553072558 - -------|)
\ 2 /
/ ___\
| 2*\/ 2 |
(94.4194882254829, sin|188.338976450966 - -------|)
\ 2 /
/ ___\
| 2*\/ 2 |
(52.00798740202069, sin|103.515974804041 - -------|)
\ 2 /
/ ___\
| 2*\/ 2 |
(15.879671885738066, sin|31.2593437714761 - -------|)
\ 2 /
/ ___\
| 2*\/ 2 |
(-94.4194882254829, sin|188.338976450966 - -------|)
\ 2 /
/ ___\
| 2*\/ 2 |
(-9.596486578558478, sin|18.692973157117 - -------|)
\ 2 /
/ ___\
| 2*\/ 2 |
(56.72037638240538, sin|112.940752764811 - -------|)
\ 2 /
/ ___\
| 2*\/ 2 |
(37.87082046086662, sin|75.2416409217332 - -------|)
\ 2 /
/ ___\
| 2*\/ 2 |
(-80.28232128432883, sin|160.064642568658 - -------|)
\ 2 /
/ ___\
| 2*\/ 2 |
(1.7425049445839957, sin|2.98500988916799 - -------|)
\ 2 /
/ ___\
| 2*\/ 2 |
(-47.295598421636, sin|94.091196843272 - -------|)
\ 2 /
/ ___\
| 2*\/ 2 |
(-88.13630291830331, sin|175.772605836607 - -------|)
\ 2 /
/ ___\
| 2*\/ 2 |
(-116.41063680061144, sin|232.321273601223 - -------|)
\ 2 /
/ ___\
| 2*\/ 2 |
(-59.86196903599517, sin|119.22393807199 - -------|)
\ 2 /
/ ___\
| 2*\/ 2 |
(89.7070992450982, sin|178.914198490196 - -------|)
\ 2 /
/ ___\
| 2*\/ 2 |
(-23634.373241573805, sin|47268.2464831476 - -------|)
\ 2 /
/ ___\
| 2*\/ 2 |
(-30.016838826892133, sin|59.5336776537843 - -------|)
\ 2 /
/ ___\
| 2*\/ 2 |
(6.454893924968686, sin|12.4097878499374 - -------|)
\ 2 /
/ ___\
| 2*\/ 2 |
(-23.733653519712547, sin|46.9673070394251 - -------|)
\ 2 /
/ ___\
| 2*\/ 2 |
(100.70267353266249, sin|200.905347065325 - -------|)
\ 2 /
/ ___\
| 2*\/ 2 |
(-17.45046821253296, sin|34.4009364250659 - -------|)
\ 2 /
/ ___\
| 2*\/ 2 |
(50.43719107522579, sin|100.374382150452 - -------|)
\ 2 /
/ ___\
| 2*\/ 2 |
(28.44604250009724, sin|56.3920850001945 - -------|)
\ 2 /
/ ___\
| 2*\/ 2 |
(-28.44604250009724, sin|56.3920850001945 - -------|)
\ 2 /
/ ___\
| 2*\/ 2 |
(-14.30887555894317, sin|28.1177511178863 - -------|)
\ 2 /
/ ___\
| 2*\/ 2 |
(20.592060866122754, sin|40.6841217322455 - -------|)
\ 2 /
/ ___\
| 2*\/ 2 |
(44.154005768046204, sin|87.8080115360924 - -------|)
\ 2 /
/ ___\
| 2*\/ 2 |
(-3.3133012713788923, sin|6.12660254275778 - -------|)
\ 2 /
/ ___\
| 2*\/ 2 |
(-36.30002413407172, sin|72.1000482681434 - -------|)
\ 2 /
/ ___\
| 2*\/ 2 |
(53.57878372881559, sin|106.657567457631 - -------|)
\ 2 /
/ ___\
| 2*\/ 2 |
(34.72922780727683, sin|68.9584556145537 - -------|)
\ 2 /
/ ___\
| 2*\/ 2 |
(-26.87524617330234, sin|53.2504923466047 - -------|)
\ 2 /
/ ___\
| 2*\/ 2 |
(-37.87082046086662, sin|75.2416409217332 - -------|)
\ 2 /
/ ___\
| 2*\/ 2 |
(31.58763515368703, sin|62.6752703073741 - -------|)
\ 2 /
/ ___\
| 2*\/ 2 |
(-95.9902845522778, sin|191.480569104556 - -------|)
\ 2 /
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:
$$x_{1} = -91.2778955718931$$
$$x_{2} = 78.7115249575339$$
$$x_{3} = 3.31330127137889$$
$$x_{4} = -50.4371910752258$$
$$x_{5} = 66.1451543431748$$
$$x_{6} = -66.1451543431748$$
$$x_{7} = -97.5610808790727$$
$$x_{8} = 22.1628571929177$$
$$x_{9} = 97.5610808790727$$
$$x_{10} = 72.4283396503543$$
$$x_{11} = 81.8531176111237$$
$$x_{12} = -31.587635153687$$
$$x_{13} = -22.1628571929177$$
$$x_{14} = 88.1363029183033$$
$$x_{15} = -69.2867469967645$$
$$x_{16} = 59.8619690359952$$
$$x_{17} = 9.59648657855848$$
$$x_{18} = -53.5787837288156$$
$$x_{19} = -81.8531176111237$$
$$x_{20} = -15.8796718857381$$
$$x_{21} = -75.5699323039441$$
$$x_{22} = -25.3044498465074$$
$$x_{23} = 12.7380792321483$$
$$x_{24} = -6.45489392496869$$
$$x_{25} = -273.490269480101$$
$$x_{26} = -72.4283396503543$$
$$x_{27} = 75.5699323039441$$
$$x_{28} = -760.437130786519$$
$$x_{29} = -44.1540057680462$$
$$x_{30} = 94.4194882254829$$
$$x_{31} = 15.8796718857381$$
$$x_{32} = -94.4194882254829$$
$$x_{33} = -9.59648657855848$$
$$x_{34} = 56.7203763824054$$
$$x_{35} = 37.8708204608666$$
$$x_{36} = -47.295598421636$$
$$x_{37} = -88.1363029183033$$
$$x_{38} = -116.410636800611$$
$$x_{39} = -59.8619690359952$$
$$x_{40} = -23634.3732415738$$
$$x_{41} = 6.45489392496869$$
$$x_{42} = 100.702673532662$$
$$x_{43} = 50.4371910752258$$
$$x_{44} = 28.4460425000972$$
$$x_{45} = -28.4460425000972$$
$$x_{46} = 44.1540057680462$$
$$x_{47} = -3.31330127137889$$
$$x_{48} = 53.5787837288156$$
$$x_{49} = 34.7292278072768$$
$$x_{50} = -37.8708204608666$$
$$x_{51} = 31.587635153687$$
Puntos máximos de la función:
$$x_{51} = -8.02569025176358$$
$$x_{51} = -67.7159506699697$$
$$x_{51} = 80.2823212843288$$
$$x_{51} = -52.0079874020207$$
$$x_{51} = -73.9991359771492$$
$$x_{51} = 55.1495800556105$$
$$x_{51} = 64.5743580163799$$
$$x_{51} = -89.7070992450982$$
$$x_{51} = 14.3088755589432$$
$$x_{51} = 42.5832094412513$$
$$x_{51} = 58.2911727092003$$
$$x_{51} = 23.7336535197125$$
$$x_{51} = 86.5655065915084$$
$$x_{51} = 0$$
$$x_{51} = 30.0168388268921$$
$$x_{51} = 73.9991359771492$$
$$x_{51} = 8.02569025176358$$
$$x_{51} = -45.7248020948411$$
$$x_{51} = 45.7248020948411$$
$$x_{51} = -1.742504944584$$
$$x_{51} = -58.2911727092003$$
$$x_{51} = -39.4416167876615$$
$$x_{51} = 95.9902845522778$$
$$x_{51} = 36.3000241340717$$
$$x_{51} = -83.4239139379186$$
$$x_{51} = 67.7159506699697$$
$$x_{51} = -61.4327653627901$$
$$x_{51} = 52.0079874020207$$
$$x_{51} = -80.2823212843288$$
$$x_{51} = 1.742504944584$$
$$x_{51} = 89.7070992450982$$
$$x_{51} = -30.0168388268921$$
$$x_{51} = -23.7336535197125$$
$$x_{51} = -17.450468212533$$
$$x_{51} = -14.3088755589432$$
$$x_{51} = 20.5920608661228$$
$$x_{51} = -36.3000241340717$$
$$x_{51} = -26.8752461733023$$
$$x_{51} = -95.9902845522778$$
Decrece en los intervalos
$$\left[100.702673532662, \infty\right)$$
Crece en los intervalos
$$\left(-\infty, -23634.3732415738\right]$$