Sr Examen

sin(t)<0.4 desigualdades

En la desigualdad la incógnita

Solución

Ha introducido [src]
sin(t) < 2/5
$$\sin{\left(t \right)} < \frac{2}{5}$$
sin(t) < 2/5
Solución detallada
Se da la desigualdad:
$$\sin{\left(t \right)} < \frac{2}{5}$$
Para resolver esta desigualdad primero hay que resolver la ecuación correspondiente:
$$\sin{\left(t \right)} = \frac{2}{5}$$
Resolvemos:
Tenemos la ecuación
$$\sin{\left(t \right)} = \frac{2}{5}$$
cambiamos
$$\sin{\left(t \right)} - \frac{2}{5} = 0$$
$$\sin{\left(t \right)} - \frac{2}{5} = 0$$
Sustituimos
$$w = \sin{\left(t \right)}$$
Transportamos los términos libres (sin w)
del miembro izquierdo al derecho, obtenemos:
$$w = \frac{2}{5}$$
Obtenemos la respuesta: w = 2/5
hacemos cambio inverso
$$\sin{\left(t \right)} = w$$
sustituimos w:
$$x_{1} = 94.6592964537613$$
$$x_{2} = -87.5530774544467$$
$$x_{3} = 75.8097405322225$$
$$x_{4} = -72.6681478786327$$
$$x_{5} = 12.9778874604267$$
$$x_{6} = -74.9867068400875$$
$$x_{7} = -78.9513331858123$$
$$x_{8} = -47.5354066499144$$
$$x_{9} = 25.5442580747858$$
$$x_{10} = 21.5796317290611$$
$$x_{11} = 15.2964464218815$$
$$x_{12} = 38.110628689145$$
$$x_{13} = -60.1017772642736$$
$$x_{14} = -62.4203362257284$$
$$x_{15} = 65.5619288793182$$
$$x_{16} = -22.402665421196$$
$$x_{17} = 88.3761111465817$$
$$x_{18} = -18.4380390754713$$
$$x_{19} = -100.119448068806$$
$$x_{20} = -41.2522213427348$$
$$x_{21} = -37.28759499701$$
$$x_{22} = 71.8451141864978$$
$$x_{23} = 19.2610727676062$$
$$x_{24} = -9.83629480683687$$
$$x_{25} = -16.1194801140165$$
$$x_{26} = 2.73007580752231$$
$$x_{27} = -31.0044096898304$$
$$x_{28} = 78.1282994936773$$
$$x_{29} = -28.6858507283756$$
$$x_{30} = -66.3849625714531$$
$$x_{31} = -97.8008891073511$$
$$x_{32} = -68.703521532908$$
$$x_{33} = -34.9690360355552$$
$$x_{34} = 82.0929258394021$$
$$x_{35} = -53.818591957094$$
$$x_{36} = 69.5265552250429$$
$$x_{37} = 63.2433699178634$$
$$x_{38} = 52.995558264959$$
$$x_{39} = -93.8362627616263$$
$$x_{40} = -24.7212243826509$$
$$x_{41} = -3.55310949965728$$
$$x_{42} = 0.411516846067488$$
$$x_{43} = 59.2787435721386$$
$$x_{44} = 50.6769993035042$$
$$x_{45} = 40.4291876505998$$
$$x_{46} = 90.6946701080365$$
$$x_{47} = -49.8539656113692$$
$$x_{48} = 27.8628170362407$$
$$x_{49} = -85.2345184929919$$
$$x_{50} = 697.845085943002$$
$$x_{51} = 6.69470215324707$$
$$x_{52} = 46.7123729577794$$
$$x_{53} = 9.01326111470189$$
$$x_{54} = -81.2698921472671$$
$$x_{55} = 31.8274433819654$$
$$x_{56} = 44.3938139963246$$
$$x_{57} = 100.942481760941$$
$$x_{58} = 56.9601846106838$$
$$x_{59} = 34.1460023434202$$
$$x_{60} = -12.1548537682917$$
$$x_{61} = -43.5707803041896$$
$$x_{62} = -5.8716684611121$$
$$x_{63} = 96.9778554152161$$
$$x_{64} = -56.1371509185488$$
$$x_{65} = -91.5177038001715$$
$$x_{66} = 84.4114848008569$$
$$x_{1} = 94.6592964537613$$
$$x_{2} = -87.5530774544467$$
$$x_{3} = 75.8097405322225$$
$$x_{4} = -72.6681478786327$$
$$x_{5} = 12.9778874604267$$
$$x_{6} = -74.9867068400875$$
$$x_{7} = -78.9513331858123$$
$$x_{8} = -47.5354066499144$$
$$x_{9} = 25.5442580747858$$
$$x_{10} = 21.5796317290611$$
$$x_{11} = 15.2964464218815$$
$$x_{12} = 38.110628689145$$
$$x_{13} = -60.1017772642736$$
$$x_{14} = -62.4203362257284$$
$$x_{15} = 65.5619288793182$$
$$x_{16} = -22.402665421196$$
$$x_{17} = 88.3761111465817$$
$$x_{18} = -18.4380390754713$$
$$x_{19} = -100.119448068806$$
$$x_{20} = -41.2522213427348$$
$$x_{21} = -37.28759499701$$
$$x_{22} = 71.8451141864978$$
$$x_{23} = 19.2610727676062$$
$$x_{24} = -9.83629480683687$$
$$x_{25} = -16.1194801140165$$
$$x_{26} = 2.73007580752231$$
$$x_{27} = -31.0044096898304$$
$$x_{28} = 78.1282994936773$$
$$x_{29} = -28.6858507283756$$
$$x_{30} = -66.3849625714531$$
$$x_{31} = -97.8008891073511$$
$$x_{32} = -68.703521532908$$
$$x_{33} = -34.9690360355552$$
$$x_{34} = 82.0929258394021$$
$$x_{35} = -53.818591957094$$
$$x_{36} = 69.5265552250429$$
$$x_{37} = 63.2433699178634$$
$$x_{38} = 52.995558264959$$
$$x_{39} = -93.8362627616263$$
$$x_{40} = -24.7212243826509$$
$$x_{41} = -3.55310949965728$$
$$x_{42} = 0.411516846067488$$
$$x_{43} = 59.2787435721386$$
$$x_{44} = 50.6769993035042$$
$$x_{45} = 40.4291876505998$$
$$x_{46} = 90.6946701080365$$
$$x_{47} = -49.8539656113692$$
$$x_{48} = 27.8628170362407$$
$$x_{49} = -85.2345184929919$$
$$x_{50} = 697.845085943002$$
$$x_{51} = 6.69470215324707$$
$$x_{52} = 46.7123729577794$$
$$x_{53} = 9.01326111470189$$
$$x_{54} = -81.2698921472671$$
$$x_{55} = 31.8274433819654$$
$$x_{56} = 44.3938139963246$$
$$x_{57} = 100.942481760941$$
$$x_{58} = 56.9601846106838$$
$$x_{59} = 34.1460023434202$$
$$x_{60} = -12.1548537682917$$
$$x_{61} = -43.5707803041896$$
$$x_{62} = -5.8716684611121$$
$$x_{63} = 96.9778554152161$$
$$x_{64} = -56.1371509185488$$
$$x_{65} = -91.5177038001715$$
$$x_{66} = 84.4114848008569$$
Las raíces dadas
$$x_{19} = -100.119448068806$$
$$x_{31} = -97.8008891073511$$
$$x_{39} = -93.8362627616263$$
$$x_{65} = -91.5177038001715$$
$$x_{2} = -87.5530774544467$$
$$x_{49} = -85.2345184929919$$
$$x_{54} = -81.2698921472671$$
$$x_{7} = -78.9513331858123$$
$$x_{6} = -74.9867068400875$$
$$x_{4} = -72.6681478786327$$
$$x_{32} = -68.703521532908$$
$$x_{30} = -66.3849625714531$$
$$x_{14} = -62.4203362257284$$
$$x_{13} = -60.1017772642736$$
$$x_{64} = -56.1371509185488$$
$$x_{35} = -53.818591957094$$
$$x_{47} = -49.8539656113692$$
$$x_{8} = -47.5354066499144$$
$$x_{61} = -43.5707803041896$$
$$x_{20} = -41.2522213427348$$
$$x_{21} = -37.28759499701$$
$$x_{33} = -34.9690360355552$$
$$x_{27} = -31.0044096898304$$
$$x_{29} = -28.6858507283756$$
$$x_{40} = -24.7212243826509$$
$$x_{16} = -22.402665421196$$
$$x_{18} = -18.4380390754713$$
$$x_{25} = -16.1194801140165$$
$$x_{60} = -12.1548537682917$$
$$x_{24} = -9.83629480683687$$
$$x_{62} = -5.8716684611121$$
$$x_{41} = -3.55310949965728$$
$$x_{42} = 0.411516846067488$$
$$x_{26} = 2.73007580752231$$
$$x_{51} = 6.69470215324707$$
$$x_{53} = 9.01326111470189$$
$$x_{5} = 12.9778874604267$$
$$x_{11} = 15.2964464218815$$
$$x_{23} = 19.2610727676062$$
$$x_{10} = 21.5796317290611$$
$$x_{9} = 25.5442580747858$$
$$x_{48} = 27.8628170362407$$
$$x_{55} = 31.8274433819654$$
$$x_{59} = 34.1460023434202$$
$$x_{12} = 38.110628689145$$
$$x_{45} = 40.4291876505998$$
$$x_{56} = 44.3938139963246$$
$$x_{52} = 46.7123729577794$$
$$x_{44} = 50.6769993035042$$
$$x_{38} = 52.995558264959$$
$$x_{58} = 56.9601846106838$$
$$x_{43} = 59.2787435721386$$
$$x_{37} = 63.2433699178634$$
$$x_{15} = 65.5619288793182$$
$$x_{36} = 69.5265552250429$$
$$x_{22} = 71.8451141864978$$
$$x_{3} = 75.8097405322225$$
$$x_{28} = 78.1282994936773$$
$$x_{34} = 82.0929258394021$$
$$x_{66} = 84.4114848008569$$
$$x_{17} = 88.3761111465817$$
$$x_{46} = 90.6946701080365$$
$$x_{1} = 94.6592964537613$$
$$x_{63} = 96.9778554152161$$
$$x_{57} = 100.942481760941$$
$$x_{50} = 697.845085943002$$
son puntos de cambio del signo de desigualdad en las soluciones.
Primero definámonos con el signo hasta el punto extremo izquierdo:
$$x_{0} < x_{19}$$
Consideremos, por ejemplo, el punto
$$x_{0} = x_{19} - \frac{1}{10}$$
=
$$-100.119448068806 + - \frac{1}{10}$$
=
$$-100.219448068806$$
lo sustituimos en la expresión
$$\sin{\left(t \right)} < \frac{2}{5}$$
$$\sin{\left(t \right)} < \frac{2}{5}$$
sin(t) < 2/5

Entonces
$$x < -100.119448068806$$
no se cumple
significa que una de las soluciones de nuestra ecuación será con:
$$x > -100.119448068806 \wedge x < -97.8008891073511$$
         _____           _____           _____           _____           _____           _____           _____           _____           _____           _____           _____           _____           _____           _____           _____           _____           _____           _____           _____           _____           _____           _____           _____           _____           _____           _____           _____           _____           _____           _____           _____           _____           _____  
        /     \         /     \         /     \         /     \         /     \         /     \         /     \         /     \         /     \         /     \         /     \         /     \         /     \         /     \         /     \         /     \         /     \         /     \         /     \         /     \         /     \         /     \         /     \         /     \         /     \         /     \         /     \         /     \         /     \         /     \         /     \         /     \         /     \  
-------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-------
       x19      x31      x39      x65      x2      x49      x54      x7      x6      x4      x32      x30      x14      x13      x64      x35      x47      x8      x61      x20      x21      x33      x27      x29      x40      x16      x18      x25      x60      x24      x62      x41      x42      x26      x51      x53      x5      x11      x23      x10      x9      x48      x55      x59      x12      x45      x56      x52      x44      x38      x58      x43      x37      x15      x36      x22      x3      x28      x34      x66      x17      x46      x1      x63      x57      x50

Recibiremos otras soluciones de la desigualdad pasando al polo siguiente etc.
etc.
Respuesta:
$$x > -100.119448068806 \wedge x < -97.8008891073511$$
$$x > -93.8362627616263 \wedge x < -91.5177038001715$$
$$x > -87.5530774544467 \wedge x < -85.2345184929919$$
$$x > -81.2698921472671 \wedge x < -78.9513331858123$$
$$x > -74.9867068400875 \wedge x < -72.6681478786327$$
$$x > -68.703521532908 \wedge x < -66.3849625714531$$
$$x > -62.4203362257284 \wedge x < -60.1017772642736$$
$$x > -56.1371509185488 \wedge x < -53.818591957094$$
$$x > -49.8539656113692 \wedge x < -47.5354066499144$$
$$x > -43.5707803041896 \wedge x < -41.2522213427348$$
$$x > -37.28759499701 \wedge x < -34.9690360355552$$
$$x > -31.0044096898304 \wedge x < -28.6858507283756$$
$$x > -24.7212243826509 \wedge x < -22.402665421196$$
$$x > -18.4380390754713 \wedge x < -16.1194801140165$$
$$x > -12.1548537682917 \wedge x < -9.83629480683687$$
$$x > -5.8716684611121 \wedge x < -3.55310949965728$$
$$x > 0.411516846067488 \wedge x < 2.73007580752231$$
$$x > 6.69470215324707 \wedge x < 9.01326111470189$$
$$x > 12.9778874604267 \wedge x < 15.2964464218815$$
$$x > 19.2610727676062 \wedge x < 21.5796317290611$$
$$x > 25.5442580747858 \wedge x < 27.8628170362407$$
$$x > 31.8274433819654 \wedge x < 34.1460023434202$$
$$x > 38.110628689145 \wedge x < 40.4291876505998$$
$$x > 44.3938139963246 \wedge x < 46.7123729577794$$
$$x > 50.6769993035042 \wedge x < 52.995558264959$$
$$x > 56.9601846106838 \wedge x < 59.2787435721386$$
$$x > 63.2433699178634 \wedge x < 65.5619288793182$$
$$x > 69.5265552250429 \wedge x < 71.8451141864978$$
$$x > 75.8097405322225 \wedge x < 78.1282994936773$$
$$x > 82.0929258394021 \wedge x < 84.4114848008569$$
$$x > 88.3761111465817 \wedge x < 90.6946701080365$$
$$x > 94.6592964537613 \wedge x < 96.9778554152161$$
$$x > 100.942481760941 \wedge x < 697.845085943002$$
Respuesta rápida 2 [src]
        /    ____\              /    ____\       
        |2*\/ 21 |              |2*\/ 21 |       
[0, atan|--------|) U (pi - atan|--------|, 2*pi]
        \   21   /              \   21   /       
$$x\ in\ \left[0, \operatorname{atan}{\left(\frac{2 \sqrt{21}}{21} \right)}\right) \cup \left(\pi - \operatorname{atan}{\left(\frac{2 \sqrt{21}}{21} \right)}, 2 \pi\right]$$
x in Union(Interval.Ropen(0, atan(2*sqrt(21)/21)), Interval.Lopen(pi - atan(2*sqrt(21)/21), 2*pi))
Respuesta rápida [src]
  /   /                /    ____\\     /                    /    ____\    \\
  |   |                |2*\/ 21 ||     |                    |2*\/ 21 |    ||
Or|And|0 <= t, t < atan|--------||, And|t <= 2*pi, pi - atan|--------| < t||
  \   \                \   21   //     \                    \   21   /    //
$$\left(0 \leq t \wedge t < \operatorname{atan}{\left(\frac{2 \sqrt{21}}{21} \right)}\right) \vee \left(t \leq 2 \pi \wedge \pi - \operatorname{atan}{\left(\frac{2 \sqrt{21}}{21} \right)} < t\right)$$
((0 <= t)∧(t < atan(2*sqrt(21)/21)))∨((t <= 2*pi)∧(pi - atan(2*sqrt(21)/21) < t))