Sr Examen

tg(x)abs(cos(x))>0 desigualdades

En la desigualdad la incógnita

Solución

Ha introducido [src]
tan(x)*|cos(x)| > 0
$$\tan{\left(x \right)} \left|{\cos{\left(x \right)}}\right| > 0$$
tan(x)*Abs(cos(x)) > 0
Solución detallada
Se da la desigualdad:
$$\tan{\left(x \right)} \left|{\cos{\left(x \right)}}\right| > 0$$
Para resolver esta desigualdad primero hay que resolver la ecuación correspondiente:
$$\tan{\left(x \right)} \left|{\cos{\left(x \right)}}\right| = 0$$
Resolvemos:
$$x_{1} = -59.6902604182061$$
$$x_{2} = -62.8318530717959$$
$$x_{3} = -97.3893722612836$$
$$x_{4} = 87.9645943005142$$
$$x_{5} = -56.5486677646163$$
$$x_{6} = 31.4159265358979$$
$$x_{7} = 69.1150383789755$$
$$x_{8} = -37.6991118430775$$
$$x_{9} = -81.6814089933346$$
$$x_{10} = 42119.3327066784$$
$$x_{11} = -84.8230016469244$$
$$x_{12} = -21.9911485751286$$
$$x_{13} = 47.1238898038469$$
$$x_{14} = -15.707963267949$$
$$x_{15} = -12.5663706143592$$
$$x_{16} = 12.5663706143592$$
$$x_{17} = -87.9645943005142$$
$$x_{18} = 53.4070751110265$$
$$x_{19} = -182.212373908208$$
$$x_{20} = -100.530964914873$$
$$x_{21} = -3.14159265358979$$
$$x_{22} = 72.2566310325652$$
$$x_{23} = 34.5575191894877$$
$$x_{24} = -94.2477796076938$$
$$x_{25} = 6.28318530717959$$
$$x_{26} = -69.1150383789755$$
$$x_{27} = 97.3893722612836$$
$$x_{28} = 0$$
$$x_{29} = 65.9734457253857$$
$$x_{30} = -50.2654824574367$$
$$x_{31} = 15.707963267949$$
$$x_{32} = 3.14159265358979$$
$$x_{33} = -25.1327412287183$$
$$x_{34} = -18.8495559215388$$
$$x_{35} = 40.8407044966673$$
$$x_{36} = -53.4070751110265$$
$$x_{37} = 37.6991118430775$$
$$x_{38} = -43.9822971502571$$
$$x_{39} = 18.8495559215388$$
$$x_{40} = -78.5398163397448$$
$$x_{41} = -6.28318530717959$$
$$x_{42} = -40.8407044966673$$
$$x_{43} = 43.9822971502571$$
$$x_{44} = 56.5486677646163$$
$$x_{45} = -65.9734457253857$$
$$x_{46} = -430.398193541802$$
$$x_{47} = 25.1327412287183$$
$$x_{48} = 78.5398163397448$$
$$x_{49} = -28.2743338823081$$
$$x_{50} = 75.398223686155$$
$$x_{51} = 59.6902604182061$$
$$x_{52} = -34.5575191894877$$
$$x_{53} = 81.6814089933346$$
$$x_{54} = -47.1238898038469$$
$$x_{55} = 100.530964914873$$
$$x_{56} = -9.42477796076938$$
$$x_{57} = 223.053078404875$$
$$x_{58} = -75.398223686155$$
$$x_{59} = -358.141562509236$$
$$x_{60} = 28.2743338823081$$
$$x_{61} = -72.2566310325652$$
$$x_{62} = -91.106186954104$$
$$x_{63} = -295.309709437441$$
$$x_{64} = 21.9911485751286$$
$$x_{65} = 62.8318530717959$$
$$x_{66} = -31.4159265358979$$
$$x_{67} = 9.42477796076938$$
$$x_{68} = 50.2654824574367$$
$$x_{69} = 94.2477796076938$$
$$x_{70} = 91.106186954104$$
$$x_{71} = -116.238928182822$$
$$x_{72} = 84.8230016469244$$
$$x_{1} = -59.6902604182061$$
$$x_{2} = -62.8318530717959$$
$$x_{3} = -97.3893722612836$$
$$x_{4} = 87.9645943005142$$
$$x_{5} = -56.5486677646163$$
$$x_{6} = 31.4159265358979$$
$$x_{7} = 69.1150383789755$$
$$x_{8} = -37.6991118430775$$
$$x_{9} = -81.6814089933346$$
$$x_{10} = 42119.3327066784$$
$$x_{11} = -84.8230016469244$$
$$x_{12} = -21.9911485751286$$
$$x_{13} = 47.1238898038469$$
$$x_{14} = -15.707963267949$$
$$x_{15} = -12.5663706143592$$
$$x_{16} = 12.5663706143592$$
$$x_{17} = -87.9645943005142$$
$$x_{18} = 53.4070751110265$$
$$x_{19} = -182.212373908208$$
$$x_{20} = -100.530964914873$$
$$x_{21} = -3.14159265358979$$
$$x_{22} = 72.2566310325652$$
$$x_{23} = 34.5575191894877$$
$$x_{24} = -94.2477796076938$$
$$x_{25} = 6.28318530717959$$
$$x_{26} = -69.1150383789755$$
$$x_{27} = 97.3893722612836$$
$$x_{28} = 0$$
$$x_{29} = 65.9734457253857$$
$$x_{30} = -50.2654824574367$$
$$x_{31} = 15.707963267949$$
$$x_{32} = 3.14159265358979$$
$$x_{33} = -25.1327412287183$$
$$x_{34} = -18.8495559215388$$
$$x_{35} = 40.8407044966673$$
$$x_{36} = -53.4070751110265$$
$$x_{37} = 37.6991118430775$$
$$x_{38} = -43.9822971502571$$
$$x_{39} = 18.8495559215388$$
$$x_{40} = -78.5398163397448$$
$$x_{41} = -6.28318530717959$$
$$x_{42} = -40.8407044966673$$
$$x_{43} = 43.9822971502571$$
$$x_{44} = 56.5486677646163$$
$$x_{45} = -65.9734457253857$$
$$x_{46} = -430.398193541802$$
$$x_{47} = 25.1327412287183$$
$$x_{48} = 78.5398163397448$$
$$x_{49} = -28.2743338823081$$
$$x_{50} = 75.398223686155$$
$$x_{51} = 59.6902604182061$$
$$x_{52} = -34.5575191894877$$
$$x_{53} = 81.6814089933346$$
$$x_{54} = -47.1238898038469$$
$$x_{55} = 100.530964914873$$
$$x_{56} = -9.42477796076938$$
$$x_{57} = 223.053078404875$$
$$x_{58} = -75.398223686155$$
$$x_{59} = -358.141562509236$$
$$x_{60} = 28.2743338823081$$
$$x_{61} = -72.2566310325652$$
$$x_{62} = -91.106186954104$$
$$x_{63} = -295.309709437441$$
$$x_{64} = 21.9911485751286$$
$$x_{65} = 62.8318530717959$$
$$x_{66} = -31.4159265358979$$
$$x_{67} = 9.42477796076938$$
$$x_{68} = 50.2654824574367$$
$$x_{69} = 94.2477796076938$$
$$x_{70} = 91.106186954104$$
$$x_{71} = -116.238928182822$$
$$x_{72} = 84.8230016469244$$
Las raíces dadas
$$x_{46} = -430.398193541802$$
$$x_{59} = -358.141562509236$$
$$x_{63} = -295.309709437441$$
$$x_{19} = -182.212373908208$$
$$x_{71} = -116.238928182822$$
$$x_{20} = -100.530964914873$$
$$x_{3} = -97.3893722612836$$
$$x_{24} = -94.2477796076938$$
$$x_{62} = -91.106186954104$$
$$x_{17} = -87.9645943005142$$
$$x_{11} = -84.8230016469244$$
$$x_{9} = -81.6814089933346$$
$$x_{40} = -78.5398163397448$$
$$x_{58} = -75.398223686155$$
$$x_{61} = -72.2566310325652$$
$$x_{26} = -69.1150383789755$$
$$x_{45} = -65.9734457253857$$
$$x_{2} = -62.8318530717959$$
$$x_{1} = -59.6902604182061$$
$$x_{5} = -56.5486677646163$$
$$x_{36} = -53.4070751110265$$
$$x_{30} = -50.2654824574367$$
$$x_{54} = -47.1238898038469$$
$$x_{38} = -43.9822971502571$$
$$x_{42} = -40.8407044966673$$
$$x_{8} = -37.6991118430775$$
$$x_{52} = -34.5575191894877$$
$$x_{66} = -31.4159265358979$$
$$x_{49} = -28.2743338823081$$
$$x_{33} = -25.1327412287183$$
$$x_{12} = -21.9911485751286$$
$$x_{34} = -18.8495559215388$$
$$x_{14} = -15.707963267949$$
$$x_{15} = -12.5663706143592$$
$$x_{56} = -9.42477796076938$$
$$x_{41} = -6.28318530717959$$
$$x_{21} = -3.14159265358979$$
$$x_{28} = 0$$
$$x_{32} = 3.14159265358979$$
$$x_{25} = 6.28318530717959$$
$$x_{67} = 9.42477796076938$$
$$x_{16} = 12.5663706143592$$
$$x_{31} = 15.707963267949$$
$$x_{39} = 18.8495559215388$$
$$x_{64} = 21.9911485751286$$
$$x_{47} = 25.1327412287183$$
$$x_{60} = 28.2743338823081$$
$$x_{6} = 31.4159265358979$$
$$x_{23} = 34.5575191894877$$
$$x_{37} = 37.6991118430775$$
$$x_{35} = 40.8407044966673$$
$$x_{43} = 43.9822971502571$$
$$x_{13} = 47.1238898038469$$
$$x_{68} = 50.2654824574367$$
$$x_{18} = 53.4070751110265$$
$$x_{44} = 56.5486677646163$$
$$x_{51} = 59.6902604182061$$
$$x_{65} = 62.8318530717959$$
$$x_{29} = 65.9734457253857$$
$$x_{7} = 69.1150383789755$$
$$x_{22} = 72.2566310325652$$
$$x_{50} = 75.398223686155$$
$$x_{48} = 78.5398163397448$$
$$x_{53} = 81.6814089933346$$
$$x_{72} = 84.8230016469244$$
$$x_{4} = 87.9645943005142$$
$$x_{70} = 91.106186954104$$
$$x_{69} = 94.2477796076938$$
$$x_{27} = 97.3893722612836$$
$$x_{55} = 100.530964914873$$
$$x_{57} = 223.053078404875$$
$$x_{10} = 42119.3327066784$$
son puntos de cambio del signo de desigualdad en las soluciones.
Primero definámonos con el signo hasta el punto extremo izquierdo:
$$x_{0} < x_{46}$$
Consideremos, por ejemplo, el punto
$$x_{0} = x_{46} - \frac{1}{10}$$
=
$$-430.398193541802 + - \frac{1}{10}$$
=
$$-430.498193541802$$
lo sustituimos en la expresión
$$\tan{\left(x \right)} \left|{\cos{\left(x \right)}}\right| > 0$$
$$\tan{\left(-430.498193541802 \right)} \left|{\cos{\left(-430.498193541802 \right)}}\right| > 0$$
-0.0998334166468517 > 0

Entonces
$$x < -430.398193541802$$
no se cumple
significa que una de las soluciones de nuestra ecuación será con:
$$x > -430.398193541802 \wedge x < -358.141562509236$$
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-------ο-------ο-------ο-------ο-------ο-------ο-------ο-------ο-------ο-------ο-------ο-------ο-------ο-------ο-------ο-------ο-------ο-------ο-------ο-------ο-------ο-------ο-------ο-------ο-------ο-------ο-------ο-------ο-------ο-------ο-------ο-------ο-------ο-------ο-------ο-------ο-------ο-------ο-------ο-------ο-------ο-------ο-------ο-------ο-------ο-------ο-------ο-------ο-------ο-------ο-------ο-------ο-------ο-------ο-------ο-------ο-------ο-------ο-------ο-------ο-------ο-------ο-------ο-------ο-------ο-------ο-------ο-------ο-------ο-------ο-------ο-------ο-------
       x46      x59      x63      x19      x71      x20      x3      x24      x62      x17      x11      x9      x40      x58      x61      x26      x45      x2      x1      x5      x36      x30      x54      x38      x42      x8      x52      x66      x49      x33      x12      x34      x14      x15      x56      x41      x21      x28      x32      x25      x67      x16      x31      x39      x64      x47      x60      x6      x23      x37      x35      x43      x13      x68      x18      x44      x51      x65      x29      x7      x22      x50      x48      x53      x72      x4      x70      x69      x27      x55      x57      x10

Recibiremos otras soluciones de la desigualdad pasando al polo siguiente etc.
etc.
Respuesta:
$$x > -430.398193541802 \wedge x < -358.141562509236$$
$$x > -295.309709437441 \wedge x < -182.212373908208$$
$$x > -116.238928182822 \wedge x < -100.530964914873$$
$$x > -97.3893722612836 \wedge x < -94.2477796076938$$
$$x > -91.106186954104 \wedge x < -87.9645943005142$$
$$x > -84.8230016469244 \wedge x < -81.6814089933346$$
$$x > -78.5398163397448 \wedge x < -75.398223686155$$
$$x > -72.2566310325652 \wedge x < -69.1150383789755$$
$$x > -65.9734457253857 \wedge x < -62.8318530717959$$
$$x > -59.6902604182061 \wedge x < -56.5486677646163$$
$$x > -53.4070751110265 \wedge x < -50.2654824574367$$
$$x > -47.1238898038469 \wedge x < -43.9822971502571$$
$$x > -40.8407044966673 \wedge x < -37.6991118430775$$
$$x > -34.5575191894877 \wedge x < -31.4159265358979$$
$$x > -28.2743338823081 \wedge x < -25.1327412287183$$
$$x > -21.9911485751286 \wedge x < -18.8495559215388$$
$$x > -15.707963267949 \wedge x < -12.5663706143592$$
$$x > -9.42477796076938 \wedge x < -6.28318530717959$$
$$x > -3.14159265358979 \wedge x < 0$$
$$x > 3.14159265358979 \wedge x < 6.28318530717959$$
$$x > 9.42477796076938 \wedge x < 12.5663706143592$$
$$x > 15.707963267949 \wedge x < 18.8495559215388$$
$$x > 21.9911485751286 \wedge x < 25.1327412287183$$
$$x > 28.2743338823081 \wedge x < 31.4159265358979$$
$$x > 34.5575191894877 \wedge x < 37.6991118430775$$
$$x > 40.8407044966673 \wedge x < 43.9822971502571$$
$$x > 47.1238898038469 \wedge x < 50.2654824574367$$
$$x > 53.4070751110265 \wedge x < 56.5486677646163$$
$$x > 59.6902604182061 \wedge x < 62.8318530717959$$
$$x > 65.9734457253857 \wedge x < 69.1150383789755$$
$$x > 72.2566310325652 \wedge x < 75.398223686155$$
$$x > 78.5398163397448 \wedge x < 81.6814089933346$$
$$x > 84.8230016469244 \wedge x < 87.9645943005142$$
$$x > 91.106186954104 \wedge x < 94.2477796076938$$
$$x > 97.3893722612836 \wedge x < 100.530964914873$$
$$x > 223.053078404875 \wedge x < 42119.3327066784$$
Solución de la desigualdad en el gráfico
Gráfico
tg(x)abs(cos(x))>0 desigualdades