Sr Examen

Otras calculadoras

|1+sin(x)|>=1/2 desigualdades

En la desigualdad la incógnita

Solución

Ha introducido [src]
|1 + sin(x)| >= 1/2
$$\left|{\sin{\left(x \right)} + 1}\right| \geq \frac{1}{2}$$
Abs(sin(x) + 1) >= 1/2
Solución detallada
Se da la desigualdad:
$$\left|{\sin{\left(x \right)} + 1}\right| \geq \frac{1}{2}$$
Para resolver esta desigualdad primero hay que resolver la ecuación correspondiente:
$$\left|{\sin{\left(x \right)} + 1}\right| = \frac{1}{2}$$
Resolvemos:
Tenemos la ecuación
$$\left|{\sin{\left(x \right)} + 1}\right| = \frac{1}{2}$$
cambiamos
$$\left|{\sin{\left(x \right)} + 1}\right| - \frac{1}{2} = 0$$
$$\left|{\sin{\left(x \right)} + 1}\right| - \frac{1}{2} = 0$$
Sustituimos
$$w = \left|{\sin{\left(x \right)} + 1}\right|$$
Transportamos los términos libres (sin w)
del miembro izquierdo al derecho, obtenemos:
$$w = \frac{1}{2}$$
Obtenemos la respuesta: w = 1/2
hacemos cambio inverso
$$\left|{\sin{\left(x \right)} + 1}\right| = w$$
sustituimos w:
$$x_{1} = -52.8834763354282$$
$$x_{2} = 47.6474885794452$$
$$x_{3} = 62.3082542961976$$
$$x_{4} = 68.5914396033772$$
$$x_{5} = -84.2994028713261$$
$$x_{6} = -195.302343298165$$
$$x_{7} = -69.6386371545737$$
$$x_{8} = 97.9129710368819$$
$$x_{9} = 93.7241808320955$$
$$x_{10} = -96.8657734856853$$
$$x_{11} = 22.5147473507269$$
$$x_{12} = 24.60914245312$$
$$x_{13} = 28.7979326579064$$
$$x_{14} = -31.9395253114962$$
$$x_{15} = 81.1578102177363$$
$$x_{16} = -8.90117918517108$$
$$x_{17} = 60.2138591938044$$
$$x_{18} = -59.1666616426078$$
$$x_{19} = 100.007366139275$$
$$x_{20} = -46.6002910282486$$
$$x_{21} = -151.320046147908$$
$$x_{22} = -44.5058959258554$$
$$x_{23} = 35.081117965086$$
$$x_{24} = -78.0162175641465$$
$$x_{25} = 56.025068989018$$
$$x_{26} = 66437.8778393414$$
$$x_{27} = 9.94837673636768$$
$$x_{28} = 12.0427718387609$$
$$x_{29} = 37.1755130674792$$
$$x_{30} = 41.3643032722656$$
$$x_{31} = 91.6297857297023$$
$$x_{32} = -38.2227106186758$$
$$x_{33} = 18.3259571459405$$
$$x_{34} = 66.497044500984$$
$$x_{35} = -63.3554518473942$$
$$x_{36} = -75.9218224617533$$
$$x_{37} = 72.7802298081635$$
$$x_{38} = 79.0634151153431$$
$$x_{39} = 53.9306738866248$$
$$x_{40} = -13.0899693899575$$
$$x_{41} = 5.75958653158129$$
$$x_{42} = -40.317105721069$$
$$x_{43} = 437.20497762458$$
$$x_{44} = 192.160750644576$$
$$x_{45} = -19.3731546971371$$
$$x_{46} = 74.8746249105567$$
$$x_{47} = 87.4409955249159$$
$$x_{48} = -65.4498469497874$$
$$x_{49} = 43.4586983746588$$
$$x_{50} = -2.61799387799149$$
$$x_{51} = -0.523598775598299$$
$$x_{52} = -6.80678408277789$$
$$x_{53} = -50.789081233035$$
$$x_{54} = 16.2315620435473$$
$$x_{55} = -88.4881930761125$$
$$x_{56} = -71.733032256967$$
$$x_{57} = -94.7713783832921$$
$$x_{58} = 30.8923277602996$$
$$x_{59} = -34.0339204138894$$
$$x_{60} = -90.5825881785057$$
$$x_{61} = 872.839158922364$$
$$x_{62} = -15.1843644923507$$
$$x_{63} = 49.7418836818384$$
$$x_{64} = -57.0722665402146$$
$$x_{65} = -21.4675497995303$$
$$x_{66} = -101.054563690472$$
$$x_{67} = -82.2050077689329$$
$$x_{68} = -25.6563400043166$$
$$x_{69} = 3.66519142918809$$
$$x_{70} = -27.7507351067098$$
$$x_{71} = 85.3466004225227$$
$$x_{1} = -52.8834763354282$$
$$x_{2} = 47.6474885794452$$
$$x_{3} = 62.3082542961976$$
$$x_{4} = 68.5914396033772$$
$$x_{5} = -84.2994028713261$$
$$x_{6} = -195.302343298165$$
$$x_{7} = -69.6386371545737$$
$$x_{8} = 97.9129710368819$$
$$x_{9} = 93.7241808320955$$
$$x_{10} = -96.8657734856853$$
$$x_{11} = 22.5147473507269$$
$$x_{12} = 24.60914245312$$
$$x_{13} = 28.7979326579064$$
$$x_{14} = -31.9395253114962$$
$$x_{15} = 81.1578102177363$$
$$x_{16} = -8.90117918517108$$
$$x_{17} = 60.2138591938044$$
$$x_{18} = -59.1666616426078$$
$$x_{19} = 100.007366139275$$
$$x_{20} = -46.6002910282486$$
$$x_{21} = -151.320046147908$$
$$x_{22} = -44.5058959258554$$
$$x_{23} = 35.081117965086$$
$$x_{24} = -78.0162175641465$$
$$x_{25} = 56.025068989018$$
$$x_{26} = 66437.8778393414$$
$$x_{27} = 9.94837673636768$$
$$x_{28} = 12.0427718387609$$
$$x_{29} = 37.1755130674792$$
$$x_{30} = 41.3643032722656$$
$$x_{31} = 91.6297857297023$$
$$x_{32} = -38.2227106186758$$
$$x_{33} = 18.3259571459405$$
$$x_{34} = 66.497044500984$$
$$x_{35} = -63.3554518473942$$
$$x_{36} = -75.9218224617533$$
$$x_{37} = 72.7802298081635$$
$$x_{38} = 79.0634151153431$$
$$x_{39} = 53.9306738866248$$
$$x_{40} = -13.0899693899575$$
$$x_{41} = 5.75958653158129$$
$$x_{42} = -40.317105721069$$
$$x_{43} = 437.20497762458$$
$$x_{44} = 192.160750644576$$
$$x_{45} = -19.3731546971371$$
$$x_{46} = 74.8746249105567$$
$$x_{47} = 87.4409955249159$$
$$x_{48} = -65.4498469497874$$
$$x_{49} = 43.4586983746588$$
$$x_{50} = -2.61799387799149$$
$$x_{51} = -0.523598775598299$$
$$x_{52} = -6.80678408277789$$
$$x_{53} = -50.789081233035$$
$$x_{54} = 16.2315620435473$$
$$x_{55} = -88.4881930761125$$
$$x_{56} = -71.733032256967$$
$$x_{57} = -94.7713783832921$$
$$x_{58} = 30.8923277602996$$
$$x_{59} = -34.0339204138894$$
$$x_{60} = -90.5825881785057$$
$$x_{61} = 872.839158922364$$
$$x_{62} = -15.1843644923507$$
$$x_{63} = 49.7418836818384$$
$$x_{64} = -57.0722665402146$$
$$x_{65} = -21.4675497995303$$
$$x_{66} = -101.054563690472$$
$$x_{67} = -82.2050077689329$$
$$x_{68} = -25.6563400043166$$
$$x_{69} = 3.66519142918809$$
$$x_{70} = -27.7507351067098$$
$$x_{71} = 85.3466004225227$$
Las raíces dadas
$$x_{6} = -195.302343298165$$
$$x_{21} = -151.320046147908$$
$$x_{66} = -101.054563690472$$
$$x_{10} = -96.8657734856853$$
$$x_{57} = -94.7713783832921$$
$$x_{60} = -90.5825881785057$$
$$x_{55} = -88.4881930761125$$
$$x_{5} = -84.2994028713261$$
$$x_{67} = -82.2050077689329$$
$$x_{24} = -78.0162175641465$$
$$x_{36} = -75.9218224617533$$
$$x_{56} = -71.733032256967$$
$$x_{7} = -69.6386371545737$$
$$x_{48} = -65.4498469497874$$
$$x_{35} = -63.3554518473942$$
$$x_{18} = -59.1666616426078$$
$$x_{64} = -57.0722665402146$$
$$x_{1} = -52.8834763354282$$
$$x_{53} = -50.789081233035$$
$$x_{20} = -46.6002910282486$$
$$x_{22} = -44.5058959258554$$
$$x_{42} = -40.317105721069$$
$$x_{32} = -38.2227106186758$$
$$x_{59} = -34.0339204138894$$
$$x_{14} = -31.9395253114962$$
$$x_{70} = -27.7507351067098$$
$$x_{68} = -25.6563400043166$$
$$x_{65} = -21.4675497995303$$
$$x_{45} = -19.3731546971371$$
$$x_{62} = -15.1843644923507$$
$$x_{40} = -13.0899693899575$$
$$x_{16} = -8.90117918517108$$
$$x_{52} = -6.80678408277789$$
$$x_{50} = -2.61799387799149$$
$$x_{51} = -0.523598775598299$$
$$x_{69} = 3.66519142918809$$
$$x_{41} = 5.75958653158129$$
$$x_{27} = 9.94837673636768$$
$$x_{28} = 12.0427718387609$$
$$x_{54} = 16.2315620435473$$
$$x_{33} = 18.3259571459405$$
$$x_{11} = 22.5147473507269$$
$$x_{12} = 24.60914245312$$
$$x_{13} = 28.7979326579064$$
$$x_{58} = 30.8923277602996$$
$$x_{23} = 35.081117965086$$
$$x_{29} = 37.1755130674792$$
$$x_{30} = 41.3643032722656$$
$$x_{49} = 43.4586983746588$$
$$x_{2} = 47.6474885794452$$
$$x_{63} = 49.7418836818384$$
$$x_{39} = 53.9306738866248$$
$$x_{25} = 56.025068989018$$
$$x_{17} = 60.2138591938044$$
$$x_{3} = 62.3082542961976$$
$$x_{34} = 66.497044500984$$
$$x_{4} = 68.5914396033772$$
$$x_{37} = 72.7802298081635$$
$$x_{46} = 74.8746249105567$$
$$x_{38} = 79.0634151153431$$
$$x_{15} = 81.1578102177363$$
$$x_{71} = 85.3466004225227$$
$$x_{47} = 87.4409955249159$$
$$x_{31} = 91.6297857297023$$
$$x_{9} = 93.7241808320955$$
$$x_{8} = 97.9129710368819$$
$$x_{19} = 100.007366139275$$
$$x_{44} = 192.160750644576$$
$$x_{43} = 437.20497762458$$
$$x_{61} = 872.839158922364$$
$$x_{26} = 66437.8778393414$$
son puntos de cambio del signo de desigualdad en las soluciones.
Primero definámonos con el signo hasta el punto extremo izquierdo:
$$x_{0} \leq x_{6}$$
Consideremos, por ejemplo, el punto
$$x_{0} = x_{6} - \frac{1}{10}$$
=
$$-195.302343298165 + - \frac{1}{10}$$
=
$$-195.402343298165$$
lo sustituimos en la expresión
$$\left|{\sin{\left(x \right)} + 1}\right| \geq \frac{1}{2}$$
$$\left|{\sin{\left(-195.402343298165 \right)} + 1}\right| \geq \frac{1}{2}$$
0.416039642398240 >= 1/2

pero
0.416039642398240 < 1/2

Entonces
$$x \leq -195.302343298165$$
no se cumple
significa que una de las soluciones de nuestra ecuación será con:
$$x \geq -195.302343298165 \wedge x \leq -151.320046147908$$
         _____           _____           _____           _____           _____           _____           _____           _____           _____           _____           _____           _____           _____           _____           _____           _____           _____           _____           _____           _____           _____           _____           _____           _____           _____           _____           _____           _____           _____           _____           _____           _____           _____           _____           _____           _____  
        /     \         /     \         /     \         /     \         /     \         /     \         /     \         /     \         /     \         /     \         /     \         /     \         /     \         /     \         /     \         /     \         /     \         /     \         /     \         /     \         /     \         /     \         /     \         /     \         /     \         /     \         /     \         /     \         /     \         /     \         /     \         /     \         /     \         /     \         /     \         /
-------•-------•-------•-------•-------•-------•-------•-------•-------•-------•-------•-------•-------•-------•-------•-------•-------•-------•-------•-------•-------•-------•-------•-------•-------•-------•-------•-------•-------•-------•-------•-------•-------•-------•-------•-------•-------•-------•-------•-------•-------•-------•-------•-------•-------•-------•-------•-------•-------•-------•-------•-------•-------•-------•-------•-------•-------•-------•-------•-------•-------•-------•-------•-------•-------•-------•-------•-------•-------•-------•-------•-------
       x6      x21      x66      x10      x57      x60      x55      x5      x67      x24      x36      x56      x7      x48      x35      x18      x64      x1      x53      x20      x22      x42      x32      x59      x14      x70      x68      x65      x45      x62      x40      x16      x52      x50      x51      x69      x41      x27      x28      x54      x33      x11      x12      x13      x58      x23      x29      x30      x49      x2      x63      x39      x25      x17      x3      x34      x4      x37      x46      x38      x15      x71      x47      x31      x9      x8      x19      x44      x43      x61      x26

Recibiremos otras soluciones de la desigualdad pasando al polo siguiente etc.
etc.
Respuesta:
$$x \geq -195.302343298165 \wedge x \leq -151.320046147908$$
$$x \geq -101.054563690472 \wedge x \leq -96.8657734856853$$
$$x \geq -94.7713783832921 \wedge x \leq -90.5825881785057$$
$$x \geq -88.4881930761125 \wedge x \leq -84.2994028713261$$
$$x \geq -82.2050077689329 \wedge x \leq -78.0162175641465$$
$$x \geq -75.9218224617533 \wedge x \leq -71.733032256967$$
$$x \geq -69.6386371545737 \wedge x \leq -65.4498469497874$$
$$x \geq -63.3554518473942 \wedge x \leq -59.1666616426078$$
$$x \geq -57.0722665402146 \wedge x \leq -52.8834763354282$$
$$x \geq -50.789081233035 \wedge x \leq -46.6002910282486$$
$$x \geq -44.5058959258554 \wedge x \leq -40.317105721069$$
$$x \geq -38.2227106186758 \wedge x \leq -34.0339204138894$$
$$x \geq -31.9395253114962 \wedge x \leq -27.7507351067098$$
$$x \geq -25.6563400043166 \wedge x \leq -21.4675497995303$$
$$x \geq -19.3731546971371 \wedge x \leq -15.1843644923507$$
$$x \geq -13.0899693899575 \wedge x \leq -8.90117918517108$$
$$x \geq -6.80678408277789 \wedge x \leq -2.61799387799149$$
$$x \geq -0.523598775598299 \wedge x \leq 3.66519142918809$$
$$x \geq 5.75958653158129 \wedge x \leq 9.94837673636768$$
$$x \geq 12.0427718387609 \wedge x \leq 16.2315620435473$$
$$x \geq 18.3259571459405 \wedge x \leq 22.5147473507269$$
$$x \geq 24.60914245312 \wedge x \leq 28.7979326579064$$
$$x \geq 30.8923277602996 \wedge x \leq 35.081117965086$$
$$x \geq 37.1755130674792 \wedge x \leq 41.3643032722656$$
$$x \geq 43.4586983746588 \wedge x \leq 47.6474885794452$$
$$x \geq 49.7418836818384 \wedge x \leq 53.9306738866248$$
$$x \geq 56.025068989018 \wedge x \leq 60.2138591938044$$
$$x \geq 62.3082542961976 \wedge x \leq 66.497044500984$$
$$x \geq 68.5914396033772 \wedge x \leq 72.7802298081635$$
$$x \geq 74.8746249105567 \wedge x \leq 79.0634151153431$$
$$x \geq 81.1578102177363 \wedge x \leq 85.3466004225227$$
$$x \geq 87.4409955249159 \wedge x \leq 91.6297857297023$$
$$x \geq 93.7241808320955 \wedge x \leq 97.9129710368819$$
$$x \geq 100.007366139275 \wedge x \leq 192.160750644576$$
$$x \geq 437.20497762458 \wedge x \leq 872.839158922364$$
$$x \geq 66437.8778393414$$
Solución de la desigualdad en el gráfico