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2cos(x/2)+7sin(x/2)=1 la ecuación

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Solución numérica:

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Solución

Ha introducido [src]
     /x\        /x\    
2*cos|-| + 7*sin|-| = 1
     \2/        \2/    
$$7 \sin{\left(\frac{x}{2} \right)} + 2 \cos{\left(\frac{x}{2} \right)} = 1$$
Gráfica
Respuesta rápida [src]
           /        ____\
           |7   2*\/ 13 |
x1 = 4*atan|- - --------|
           \3      3    /
$$x_{1} = 4 \operatorname{atan}{\left(\frac{7}{3} - \frac{2 \sqrt{13}}{3} \right)}$$
           /        ____\
           |7   2*\/ 13 |
x2 = 4*atan|- + --------|
           \3      3    /
$$x_{2} = 4 \operatorname{atan}{\left(\frac{7}{3} + \frac{2 \sqrt{13}}{3} \right)}$$
x2 = 4*atan(7/3 + 2*sqrt(13)/3)
Suma y producto de raíces [src]
suma
      /        ____\         /        ____\
      |7   2*\/ 13 |         |7   2*\/ 13 |
4*atan|- - --------| + 4*atan|- + --------|
      \3      3    /         \3      3    /
$$4 \operatorname{atan}{\left(\frac{7}{3} - \frac{2 \sqrt{13}}{3} \right)} + 4 \operatorname{atan}{\left(\frac{7}{3} + \frac{2 \sqrt{13}}{3} \right)}$$
=
      /        ____\         /        ____\
      |7   2*\/ 13 |         |7   2*\/ 13 |
4*atan|- - --------| + 4*atan|- + --------|
      \3      3    /         \3      3    /
$$4 \operatorname{atan}{\left(\frac{7}{3} - \frac{2 \sqrt{13}}{3} \right)} + 4 \operatorname{atan}{\left(\frac{7}{3} + \frac{2 \sqrt{13}}{3} \right)}$$
producto
      /        ____\       /        ____\
      |7   2*\/ 13 |       |7   2*\/ 13 |
4*atan|- - --------|*4*atan|- + --------|
      \3      3    /       \3      3    /
$$4 \operatorname{atan}{\left(\frac{7}{3} - \frac{2 \sqrt{13}}{3} \right)} 4 \operatorname{atan}{\left(\frac{7}{3} + \frac{2 \sqrt{13}}{3} \right)}$$
=
       /        ____\     /        ____\
       |7   2*\/ 13 |     |7   2*\/ 13 |
16*atan|- - --------|*atan|- + --------|
       \3      3    /     \3      3    /
$$16 \operatorname{atan}{\left(\frac{7}{3} - \frac{2 \sqrt{13}}{3} \right)} \operatorname{atan}{\left(\frac{7}{3} + \frac{2 \sqrt{13}}{3} \right)}$$
16*atan(7/3 - 2*sqrt(13)/3)*atan(7/3 + 2*sqrt(13)/3)
Respuesta numérica [src]
x1 = -22614.0161123066
x2 = 93.4155878403918
x3 = 68.2828466116735
x4 = -19.6817476888408
x5 = 55.7164759973143
x6 = -75.6792305548735
x7 = -0.281006868718453
x8 = -50.5464893261551
x9 = 75.1172168174366
x10 = 24.8517343599999
x11 = -44.8144889175591
x12 = -25.4137480974368
x13 = -113.378342397951
x14 = 37.4181049743591
x15 = 49.9844755887182
x16 = -32.2481183031999
x17 = -95.0799713749958
x18 = -37.980118711796
x19 = 30.5837347685959
x20 = -26980.2787158979
x21 = 43.1501053829551
x22 = 12.2853637456407
x23 = 276.179146647183
x24 = 80.8492172260326
x25 = -748.531243321673
x26 = -21432.7772745569
x27 = -69.9472301462774
x28 = -12.8473774830776
x29 = -7.11537707448158
x30 = 62.5508462030774
x31 = -100.811971783592
x32 = 18.0173641542368
x33 = -57.3808595319183
x34 = 87.6835874317958
x35 = 5.45099353987759
x36 = -63.1128599405143
x37 = 100.249958046155
x38 = -88.2456011692327
x39 = -82.5136007606366
x39 = -82.5136007606366