Sr Examen

sin(t)<0 desigualdades

En la desigualdad la incógnita

Solución

Ha introducido [src]
sin(t) < 0
$$\sin{\left(t \right)} < 0$$
sin(t) < 0
Solución detallada
Se da la desigualdad:
$$\sin{\left(t \right)} < 0$$
Para resolver esta desigualdad primero hay que resolver la ecuación correspondiente:
$$\sin{\left(t \right)} = 0$$
Resolvemos:
Tenemos la ecuación
$$\sin{\left(t \right)} = 0$$
cambiamos
$$\sin{\left(t \right)} - 1 = 0$$
$$\sin{\left(t \right)} - 1 = 0$$
Sustituimos
$$w = \sin{\left(t \right)}$$
Transportamos los términos libres (sin w)
del miembro izquierdo al derecho, obtenemos:
$$w = 1$$
Obtenemos la respuesta: w = 1
hacemos cambio inverso
$$\sin{\left(t \right)} = w$$
sustituimos w:
$$x_{1} = -59.6902604182061$$
$$x_{2} = -62.8318530717959$$
$$x_{3} = -97.3893722612836$$
$$x_{4} = 87.9645943005142$$
$$x_{5} = -56.5486677646163$$
$$x_{6} = 31.4159265358979$$
$$x_{7} = 69.1150383789755$$
$$x_{8} = -37.6991118430775$$
$$x_{9} = -81.6814089933346$$
$$x_{10} = -84.8230016469244$$
$$x_{11} = -21.9911485751286$$
$$x_{12} = 47.1238898038469$$
$$x_{13} = -113.097335529233$$
$$x_{14} = -12.5663706143592$$
$$x_{15} = -15.707963267949$$
$$x_{16} = 12.5663706143592$$
$$x_{17} = -87.9645943005142$$
$$x_{18} = 53.4070751110265$$
$$x_{19} = -267.035375555132$$
$$x_{20} = -100.530964914873$$
$$x_{21} = -3.14159265358979$$
$$x_{22} = 72.2566310325652$$
$$x_{23} = -2642.07942166902$$
$$x_{24} = 34.5575191894877$$
$$x_{25} = -94.2477796076938$$
$$x_{26} = 6.28318530717959$$
$$x_{27} = -69.1150383789755$$
$$x_{28} = 97.3893722612836$$
$$x_{29} = 0$$
$$x_{30} = 65.9734457253857$$
$$x_{31} = -50.2654824574367$$
$$x_{32} = 15.707963267949$$
$$x_{33} = 3.14159265358979$$
$$x_{34} = -25.1327412287183$$
$$x_{35} = -18.8495559215388$$
$$x_{36} = 40.8407044966673$$
$$x_{37} = -53.4070751110265$$
$$x_{38} = 37.6991118430775$$
$$x_{39} = -43.9822971502571$$
$$x_{40} = 18.8495559215388$$
$$x_{41} = -78.5398163397448$$
$$x_{42} = -6.28318530717959$$
$$x_{43} = -232.477856365645$$
$$x_{44} = -40.8407044966673$$
$$x_{45} = 43.9822971502571$$
$$x_{46} = 56.5486677646163$$
$$x_{47} = -65.9734457253857$$
$$x_{48} = -28.2743338823081$$
$$x_{49} = 78.5398163397448$$
$$x_{50} = 25.1327412287183$$
$$x_{51} = 75.398223686155$$
$$x_{52} = 59.6902604182061$$
$$x_{53} = -34.5575191894877$$
$$x_{54} = 81.6814089933346$$
$$x_{55} = -47.1238898038469$$
$$x_{56} = 100.530964914873$$
$$x_{57} = -9.42477796076938$$
$$x_{58} = -75.398223686155$$
$$x_{59} = -72.2566310325652$$
$$x_{60} = -31.4159265358979$$
$$x_{61} = 28.2743338823081$$
$$x_{62} = -91.106186954104$$
$$x_{63} = 21.9911485751286$$
$$x_{64} = 62.8318530717959$$
$$x_{65} = 9.42477796076938$$
$$x_{66} = 50.2654824574367$$
$$x_{67} = 94.2477796076938$$
$$x_{68} = 91.106186954104$$
$$x_{69} = 84.8230016469244$$
$$x_{1} = -59.6902604182061$$
$$x_{2} = -62.8318530717959$$
$$x_{3} = -97.3893722612836$$
$$x_{4} = 87.9645943005142$$
$$x_{5} = -56.5486677646163$$
$$x_{6} = 31.4159265358979$$
$$x_{7} = 69.1150383789755$$
$$x_{8} = -37.6991118430775$$
$$x_{9} = -81.6814089933346$$
$$x_{10} = -84.8230016469244$$
$$x_{11} = -21.9911485751286$$
$$x_{12} = 47.1238898038469$$
$$x_{13} = -113.097335529233$$
$$x_{14} = -12.5663706143592$$
$$x_{15} = -15.707963267949$$
$$x_{16} = 12.5663706143592$$
$$x_{17} = -87.9645943005142$$
$$x_{18} = 53.4070751110265$$
$$x_{19} = -267.035375555132$$
$$x_{20} = -100.530964914873$$
$$x_{21} = -3.14159265358979$$
$$x_{22} = 72.2566310325652$$
$$x_{23} = -2642.07942166902$$
$$x_{24} = 34.5575191894877$$
$$x_{25} = -94.2477796076938$$
$$x_{26} = 6.28318530717959$$
$$x_{27} = -69.1150383789755$$
$$x_{28} = 97.3893722612836$$
$$x_{29} = 0$$
$$x_{30} = 65.9734457253857$$
$$x_{31} = -50.2654824574367$$
$$x_{32} = 15.707963267949$$
$$x_{33} = 3.14159265358979$$
$$x_{34} = -25.1327412287183$$
$$x_{35} = -18.8495559215388$$
$$x_{36} = 40.8407044966673$$
$$x_{37} = -53.4070751110265$$
$$x_{38} = 37.6991118430775$$
$$x_{39} = -43.9822971502571$$
$$x_{40} = 18.8495559215388$$
$$x_{41} = -78.5398163397448$$
$$x_{42} = -6.28318530717959$$
$$x_{43} = -232.477856365645$$
$$x_{44} = -40.8407044966673$$
$$x_{45} = 43.9822971502571$$
$$x_{46} = 56.5486677646163$$
$$x_{47} = -65.9734457253857$$
$$x_{48} = -28.2743338823081$$
$$x_{49} = 78.5398163397448$$
$$x_{50} = 25.1327412287183$$
$$x_{51} = 75.398223686155$$
$$x_{52} = 59.6902604182061$$
$$x_{53} = -34.5575191894877$$
$$x_{54} = 81.6814089933346$$
$$x_{55} = -47.1238898038469$$
$$x_{56} = 100.530964914873$$
$$x_{57} = -9.42477796076938$$
$$x_{58} = -75.398223686155$$
$$x_{59} = -72.2566310325652$$
$$x_{60} = -31.4159265358979$$
$$x_{61} = 28.2743338823081$$
$$x_{62} = -91.106186954104$$
$$x_{63} = 21.9911485751286$$
$$x_{64} = 62.8318530717959$$
$$x_{65} = 9.42477796076938$$
$$x_{66} = 50.2654824574367$$
$$x_{67} = 94.2477796076938$$
$$x_{68} = 91.106186954104$$
$$x_{69} = 84.8230016469244$$
Las raíces dadas
$$x_{23} = -2642.07942166902$$
$$x_{19} = -267.035375555132$$
$$x_{43} = -232.477856365645$$
$$x_{13} = -113.097335529233$$
$$x_{20} = -100.530964914873$$
$$x_{3} = -97.3893722612836$$
$$x_{25} = -94.2477796076938$$
$$x_{62} = -91.106186954104$$
$$x_{17} = -87.9645943005142$$
$$x_{10} = -84.8230016469244$$
$$x_{9} = -81.6814089933346$$
$$x_{41} = -78.5398163397448$$
$$x_{58} = -75.398223686155$$
$$x_{59} = -72.2566310325652$$
$$x_{27} = -69.1150383789755$$
$$x_{47} = -65.9734457253857$$
$$x_{2} = -62.8318530717959$$
$$x_{1} = -59.6902604182061$$
$$x_{5} = -56.5486677646163$$
$$x_{37} = -53.4070751110265$$
$$x_{31} = -50.2654824574367$$
$$x_{55} = -47.1238898038469$$
$$x_{39} = -43.9822971502571$$
$$x_{44} = -40.8407044966673$$
$$x_{8} = -37.6991118430775$$
$$x_{53} = -34.5575191894877$$
$$x_{60} = -31.4159265358979$$
$$x_{48} = -28.2743338823081$$
$$x_{34} = -25.1327412287183$$
$$x_{11} = -21.9911485751286$$
$$x_{35} = -18.8495559215388$$
$$x_{15} = -15.707963267949$$
$$x_{14} = -12.5663706143592$$
$$x_{57} = -9.42477796076938$$
$$x_{42} = -6.28318530717959$$
$$x_{21} = -3.14159265358979$$
$$x_{29} = 0$$
$$x_{33} = 3.14159265358979$$
$$x_{26} = 6.28318530717959$$
$$x_{65} = 9.42477796076938$$
$$x_{16} = 12.5663706143592$$
$$x_{32} = 15.707963267949$$
$$x_{40} = 18.8495559215388$$
$$x_{63} = 21.9911485751286$$
$$x_{50} = 25.1327412287183$$
$$x_{61} = 28.2743338823081$$
$$x_{6} = 31.4159265358979$$
$$x_{24} = 34.5575191894877$$
$$x_{38} = 37.6991118430775$$
$$x_{36} = 40.8407044966673$$
$$x_{45} = 43.9822971502571$$
$$x_{12} = 47.1238898038469$$
$$x_{66} = 50.2654824574367$$
$$x_{18} = 53.4070751110265$$
$$x_{46} = 56.5486677646163$$
$$x_{52} = 59.6902604182061$$
$$x_{64} = 62.8318530717959$$
$$x_{30} = 65.9734457253857$$
$$x_{7} = 69.1150383789755$$
$$x_{22} = 72.2566310325652$$
$$x_{51} = 75.398223686155$$
$$x_{49} = 78.5398163397448$$
$$x_{54} = 81.6814089933346$$
$$x_{69} = 84.8230016469244$$
$$x_{4} = 87.9645943005142$$
$$x_{68} = 91.106186954104$$
$$x_{67} = 94.2477796076938$$
$$x_{28} = 97.3893722612836$$
$$x_{56} = 100.530964914873$$
son puntos de cambio del signo de desigualdad en las soluciones.
Primero definámonos con el signo hasta el punto extremo izquierdo:
$$x_{0} < x_{23}$$
Consideremos, por ejemplo, el punto
$$x_{0} = x_{23} - \frac{1}{10}$$
=
$$-2642.07942166902 + - \frac{1}{10}$$
=
$$-2642.17942166902$$
lo sustituimos en la expresión
$$\sin{\left(t \right)} < 0$$
$$\sin{\left(t \right)} < 0$$
sin(t) < 0

Entonces
$$x < -2642.07942166902$$
no se cumple
significa que una de las soluciones de nuestra ecuación será con:
$$x > -2642.07942166902 \wedge x < -267.035375555132$$
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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-------
       x23      x19      x43      x13      x20      x3      x25      x62      x17      x10      x9      x41      x58      x59      x27      x47      x2      x1      x5      x37      x31      x55      x39      x44      x8      x53      x60      x48      x34      x11      x35      x15      x14      x57      x42      x21      x29      x33      x26      x65      x16      x32      x40      x63      x50      x61      x6      x24      x38      x36      x45      x12      x66      x18      x46      x52      x64      x30      x7      x22      x51      x49      x54      x69      x4      x68      x67      x28      x56

Recibiremos otras soluciones de la desigualdad pasando al polo siguiente etc.
etc.
Respuesta:
$$x > -2642.07942166902 \wedge x < -267.035375555132$$
$$x > -232.477856365645 \wedge x < -113.097335529233$$
$$x > -100.530964914873 \wedge x < -97.3893722612836$$
$$x > -94.2477796076938 \wedge x < -91.106186954104$$
$$x > -87.9645943005142 \wedge x < -84.8230016469244$$
$$x > -81.6814089933346 \wedge x < -78.5398163397448$$
$$x > -75.398223686155 \wedge x < -72.2566310325652$$
$$x > -69.1150383789755 \wedge x < -65.9734457253857$$
$$x > -62.8318530717959 \wedge x < -59.6902604182061$$
$$x > -56.5486677646163 \wedge x < -53.4070751110265$$
$$x > -50.2654824574367 \wedge x < -47.1238898038469$$
$$x > -43.9822971502571 \wedge x < -40.8407044966673$$
$$x > -37.6991118430775 \wedge x < -34.5575191894877$$
$$x > -31.4159265358979 \wedge x < -28.2743338823081$$
$$x > -25.1327412287183 \wedge x < -21.9911485751286$$
$$x > -18.8495559215388 \wedge x < -15.707963267949$$
$$x > -12.5663706143592 \wedge x < -9.42477796076938$$
$$x > -6.28318530717959 \wedge x < -3.14159265358979$$
$$x > 0 \wedge x < 3.14159265358979$$
$$x > 6.28318530717959 \wedge x < 9.42477796076938$$
$$x > 12.5663706143592 \wedge x < 15.707963267949$$
$$x > 18.8495559215388 \wedge x < 21.9911485751286$$
$$x > 25.1327412287183 \wedge x < 28.2743338823081$$
$$x > 31.4159265358979 \wedge x < 34.5575191894877$$
$$x > 37.6991118430775 \wedge x < 40.8407044966673$$
$$x > 43.9822971502571 \wedge x < 47.1238898038469$$
$$x > 50.2654824574367 \wedge x < 53.4070751110265$$
$$x > 56.5486677646163 \wedge x < 59.6902604182061$$
$$x > 62.8318530717959 \wedge x < 65.9734457253857$$
$$x > 69.1150383789755 \wedge x < 72.2566310325652$$
$$x > 75.398223686155 \wedge x < 78.5398163397448$$
$$x > 81.6814089933346 \wedge x < 84.8230016469244$$
$$x > 87.9645943005142 \wedge x < 91.106186954104$$
$$x > 94.2477796076938 \wedge x < 97.3893722612836$$
$$x > 100.530964914873$$
Respuesta rápida 2 [src]
(pi, 2*pi)
$$x\ in\ \left(\pi, 2 \pi\right)$$
x in Interval.open(pi, 2*pi)
Respuesta rápida [src]
And(pi < t, t < 2*pi)
$$\pi < t \wedge t < 2 \pi$$
(pi < t)∧(t < 2*pi)