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$$\cos{\left(x \right)} \operatorname{sign}{\left(\sin{\left(x \right)} - \frac{1}{2} \right)} = 0$$
Resolvermos esta ecuaciónRaíces de esta ecuación
$$x_{1} = 36.1283155162826$$
$$x_{2} = 86.3937979737193$$
$$x_{3} = 64.4026493985908$$
$$x_{4} = 42.4115008234622$$
$$x_{5} = -20.4203522483337$$
$$x_{6} = -80.1106126665397$$
$$x_{7} = 20.4203522483337$$
$$x_{8} = -45.553093477052$$
$$x_{9} = 70.6858347057703$$
$$x_{10} = -39.2699081698724$$
$$x_{11} = -32.9867228626928$$
$$x_{12} = -86.3937979737193$$
$$x_{13} = -95.8185759344887$$
$$x_{14} = 98.9601685880785$$
$$x_{15} = -61.261056745001$$
$$x_{16} = -17.2787595947439$$
$$x_{17} = 26.7035375555132$$
$$x_{18} = 61.261056745001$$
$$x_{19} = -4.71238898038469$$
$$x_{20} = 73.8274273593601$$
$$x_{21} = -1.5707963267949$$
$$x_{22} = -400.553063332699$$
$$x_{23} = 14.1371669411541$$
$$x_{24} = 83.2522053201295$$
$$x_{25} = -76.9690200129499$$
$$x_{26} = 1.5707963267949$$
$$x_{27} = 4.71238898038469$$
$$x_{28} = 80.1106126665397$$
$$x_{29} = -58.1194640914112$$
$$x_{30} = 7.85398163397448$$
$$x_{31} = 23.5619449019235$$
$$x_{32} = 67.5442420521806$$
$$x_{33} = -14.1371669411541$$
$$x_{34} = 45.553093477052$$
$$x_{35} = -92.6769832808989$$
$$x_{36} = 29.845130209103$$
$$x_{37} = -89.5353906273091$$
$$x_{38} = -29.845130209103$$
$$x_{39} = -26.7035375555132$$
$$x_{40} = -51.8362787842316$$
$$x_{41} = 92.6769832808989$$
$$x_{42} = -48.6946861306418$$
$$x_{43} = 48.6946861306418$$
$$x_{44} = -98.9601685880785$$
$$x_{45} = -64.4026493985908$$
$$x_{46} = 89.5353906273091$$
$$x_{47} = 39.2699081698724$$
$$x_{48} = 76.9690200129499$$
$$x_{49} = -73.8274273593601$$
$$x_{50} = 32.9867228626928$$
$$x_{51} = -10.9955742875643$$
$$x_{52} = 95.8185759344887$$
$$x_{53} = 582.765437240907$$
$$x_{54} = 10.9955742875643$$
$$x_{55} = -70.6858347057703$$
$$x_{56} = 58.1194640914112$$
$$x_{57} = -83.2522053201295$$
$$x_{58} = 51.8362787842316$$
$$x_{59} = -36.1283155162826$$
$$x_{60} = 237.190245346029$$
$$x_{61} = -7.85398163397448$$
$$x_{62} = -42.4115008234622$$
$$x_{63} = 54.9778714378214$$
$$x_{64} = -54.9778714378214$$
$$x_{65} = 17.2787595947439$$
$$x_{66} = -23.5619449019235$$
$$x_{67} = -67.5442420521806$$
Signos de extremos en los puntos:
(36.12831551628262, 1.5)
(86.39379797371932, 1.5)
(64.40264939859077, 0.5)
(42.411500823462205, 1.5)
(-20.420352248333657, 1.5)
(-80.11061266653972, 0.5)
(20.420352248333657, 0.5)
(-45.553093477052, 1.5)
(70.68583470577035, 0.5)
(-39.269908169872416, 1.5)
(-32.98672286269283, 1.5)
(-86.39379797371932, 0.5)
(-95.81857593448869, 1.5)
(98.96016858807849, 1.5)
(-61.26105674500097, 0.5)
(-17.278759594743864, 0.5)
(26.703537555513243, 0.5)
(61.26105674500097, 1.5)
(-4.71238898038469, 0.5)
(73.82742735936014, 1.5)
(-1.5707963267948966, 1.5)
(-400.5530633326986, 0.5)
(14.137166941154069, 0.5)
(83.25220532012952, 0.5)
(-76.96902001294994, 1.5)
(1.5707963267948966, 0.5)
(4.71238898038469, 1.5)
(80.11061266653972, 1.5)
(-58.119464091411174, 1.5)
(7.853981633974483, 0.5)
(23.56194490192345, 1.5)
(67.54424205218055, 1.5)
(-14.137166941154069, 1.5)
(45.553093477052, 0.5)
(-92.6769832808989, 0.5)
(29.845130209103036, 1.5)
(-89.53539062730911, 1.5)
(-29.845130209103036, 0.5)
(-26.703537555513243, 1.5)
(-51.83627878423159, 1.5)
(92.6769832808989, 1.5)
(-48.6946861306418, 0.5)
(48.6946861306418, 1.5)
(-98.96016858807849, 0.5)
(-64.40264939859077, 1.5)
(89.53539062730911, 0.5)
(39.269908169872416, 0.5)
(76.96902001294994, 0.5)
(-73.82742735936014, 0.5)
(32.98672286269283, 0.5)
(-10.995574287564276, 0.5)
(95.81857593448869, 0.5)
(582.7654372409066, 1.5)
(10.995574287564276, 1.5)
(-70.68583470577035, 1.5)
(58.119464091411174, 0.5)
(-83.25220532012952, 1.5)
(51.83627878423159, 0.5)
(-36.12831551628262, 0.5)
(237.1902453460294, 1.5)
(-7.853981633974483, 1.5)
(-42.411500823462205, 0.5)
(54.977871437821385, 1.5)
(-54.977871437821385, 0.5)
(17.278759594743864, 1.5)
(-23.56194490192345, 0.5)
(-67.54424205218055, 0.5)
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
Puntos máximos de la función:
$$x_{67} = 36.1283155162826$$
$$x_{67} = 86.3937979737193$$
$$x_{67} = 64.4026493985908$$
$$x_{67} = 42.4115008234622$$
$$x_{67} = -20.4203522483337$$
$$x_{67} = -80.1106126665397$$
$$x_{67} = 20.4203522483337$$
$$x_{67} = -45.553093477052$$
$$x_{67} = 70.6858347057703$$
$$x_{67} = -39.2699081698724$$
$$x_{67} = -32.9867228626928$$
$$x_{67} = -86.3937979737193$$
$$x_{67} = -95.8185759344887$$
$$x_{67} = 98.9601685880785$$
$$x_{67} = -61.261056745001$$
$$x_{67} = -17.2787595947439$$
$$x_{67} = 26.7035375555132$$
$$x_{67} = 61.261056745001$$
$$x_{67} = -4.71238898038469$$
$$x_{67} = 73.8274273593601$$
$$x_{67} = -1.5707963267949$$
$$x_{67} = -400.553063332699$$
$$x_{67} = 14.1371669411541$$
$$x_{67} = 83.2522053201295$$
$$x_{67} = -76.9690200129499$$
$$x_{67} = 1.5707963267949$$
$$x_{67} = 4.71238898038469$$
$$x_{67} = 80.1106126665397$$
$$x_{67} = -58.1194640914112$$
$$x_{67} = 7.85398163397448$$
$$x_{67} = 23.5619449019235$$
$$x_{67} = 67.5442420521806$$
$$x_{67} = -14.1371669411541$$
$$x_{67} = 45.553093477052$$
$$x_{67} = -92.6769832808989$$
$$x_{67} = 29.845130209103$$
$$x_{67} = -89.5353906273091$$
$$x_{67} = -29.845130209103$$
$$x_{67} = -26.7035375555132$$
$$x_{67} = -51.8362787842316$$
$$x_{67} = 92.6769832808989$$
$$x_{67} = -48.6946861306418$$
$$x_{67} = 48.6946861306418$$
$$x_{67} = -98.9601685880785$$
$$x_{67} = -64.4026493985908$$
$$x_{67} = 89.5353906273091$$
$$x_{67} = 39.2699081698724$$
$$x_{67} = 76.9690200129499$$
$$x_{67} = -73.8274273593601$$
$$x_{67} = 32.9867228626928$$
$$x_{67} = -10.9955742875643$$
$$x_{67} = 95.8185759344887$$
$$x_{67} = 582.765437240907$$
$$x_{67} = 10.9955742875643$$
$$x_{67} = -70.6858347057703$$
$$x_{67} = 58.1194640914112$$
$$x_{67} = -83.2522053201295$$
$$x_{67} = 51.8362787842316$$
$$x_{67} = -36.1283155162826$$
$$x_{67} = 237.190245346029$$
$$x_{67} = -7.85398163397448$$
$$x_{67} = -42.4115008234622$$
$$x_{67} = 54.9778714378214$$
$$x_{67} = -54.9778714378214$$
$$x_{67} = 17.2787595947439$$
$$x_{67} = -23.5619449019235$$
$$x_{67} = -67.5442420521806$$
Decrece en los intervalos
$$\left(-\infty, -400.553063332699\right]$$
Crece en los intervalos
$$\left[582.765437240907, \infty\right)$$