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log(2*y+1)/2=c-log(cos(x)) la ecuación

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Solución numérica:

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Solución

Ha introducido [src]
log(2*y + 1)                  
------------ = c - log(cos(x))
     2                        
$$\frac{\log{\left(2 y + 1 \right)}}{2} = c - \log{\left(\cos{\left(x \right)} \right)}$$
Gráfica
Respuesta rápida [src]
         /    /      c    \\              /    /      c    \\
         |    |     e     ||              |    |     e     ||
x1 = - re|acos|-----------|| + 2*pi - I*im|acos|-----------||
         |    |  _________||              |    |  _________||
         \    \\/ 1 + 2*y //              \    \\/ 1 + 2*y //
$$x_{1} = - \operatorname{re}{\left(\operatorname{acos}{\left(\frac{e^{c}}{\sqrt{2 y + 1}} \right)}\right)} - i \operatorname{im}{\left(\operatorname{acos}{\left(\frac{e^{c}}{\sqrt{2 y + 1}} \right)}\right)} + 2 \pi$$
         /    /      c    \\     /    /      c    \\
         |    |     e     ||     |    |     e     ||
x2 = I*im|acos|-----------|| + re|acos|-----------||
         |    |  _________||     |    |  _________||
         \    \\/ 1 + 2*y //     \    \\/ 1 + 2*y //
$$x_{2} = \operatorname{re}{\left(\operatorname{acos}{\left(\frac{e^{c}}{\sqrt{2 y + 1}} \right)}\right)} + i \operatorname{im}{\left(\operatorname{acos}{\left(\frac{e^{c}}{\sqrt{2 y + 1}} \right)}\right)}$$
x2 = re(acos(exp(c)/sqrt(2*y + 1))) + i*im(acos(exp(c)/sqrt(2*y + 1)))
Suma y producto de raíces [src]
suma
    /    /      c    \\              /    /      c    \\       /    /      c    \\     /    /      c    \\
    |    |     e     ||              |    |     e     ||       |    |     e     ||     |    |     e     ||
- re|acos|-----------|| + 2*pi - I*im|acos|-----------|| + I*im|acos|-----------|| + re|acos|-----------||
    |    |  _________||              |    |  _________||       |    |  _________||     |    |  _________||
    \    \\/ 1 + 2*y //              \    \\/ 1 + 2*y //       \    \\/ 1 + 2*y //     \    \\/ 1 + 2*y //
$$\left(\operatorname{re}{\left(\operatorname{acos}{\left(\frac{e^{c}}{\sqrt{2 y + 1}} \right)}\right)} + i \operatorname{im}{\left(\operatorname{acos}{\left(\frac{e^{c}}{\sqrt{2 y + 1}} \right)}\right)}\right) + \left(- \operatorname{re}{\left(\operatorname{acos}{\left(\frac{e^{c}}{\sqrt{2 y + 1}} \right)}\right)} - i \operatorname{im}{\left(\operatorname{acos}{\left(\frac{e^{c}}{\sqrt{2 y + 1}} \right)}\right)} + 2 \pi\right)$$
=
2*pi
$$2 \pi$$
producto
/    /    /      c    \\              /    /      c    \\\ /    /    /      c    \\     /    /      c    \\\
|    |    |     e     ||              |    |     e     ||| |    |    |     e     ||     |    |     e     |||
|- re|acos|-----------|| + 2*pi - I*im|acos|-----------|||*|I*im|acos|-----------|| + re|acos|-----------|||
|    |    |  _________||              |    |  _________||| |    |    |  _________||     |    |  _________|||
\    \    \\/ 1 + 2*y //              \    \\/ 1 + 2*y /// \    \    \\/ 1 + 2*y //     \    \\/ 1 + 2*y ///
$$\left(\operatorname{re}{\left(\operatorname{acos}{\left(\frac{e^{c}}{\sqrt{2 y + 1}} \right)}\right)} + i \operatorname{im}{\left(\operatorname{acos}{\left(\frac{e^{c}}{\sqrt{2 y + 1}} \right)}\right)}\right) \left(- \operatorname{re}{\left(\operatorname{acos}{\left(\frac{e^{c}}{\sqrt{2 y + 1}} \right)}\right)} - i \operatorname{im}{\left(\operatorname{acos}{\left(\frac{e^{c}}{\sqrt{2 y + 1}} \right)}\right)} + 2 \pi\right)$$
=
 /    /    /      c    \\     /    /      c    \\\ /            /    /      c    \\     /    /      c    \\\
 |    |    |     e     ||     |    |     e     ||| |            |    |     e     ||     |    |     e     |||
-|I*im|acos|-----------|| + re|acos|-----------|||*|-2*pi + I*im|acos|-----------|| + re|acos|-----------|||
 |    |    |  _________||     |    |  _________||| |            |    |  _________||     |    |  _________|||
 \    \    \\/ 1 + 2*y //     \    \\/ 1 + 2*y /// \            \    \\/ 1 + 2*y //     \    \\/ 1 + 2*y ///
$$- \left(\operatorname{re}{\left(\operatorname{acos}{\left(\frac{e^{c}}{\sqrt{2 y + 1}} \right)}\right)} + i \operatorname{im}{\left(\operatorname{acos}{\left(\frac{e^{c}}{\sqrt{2 y + 1}} \right)}\right)}\right) \left(\operatorname{re}{\left(\operatorname{acos}{\left(\frac{e^{c}}{\sqrt{2 y + 1}} \right)}\right)} + i \operatorname{im}{\left(\operatorname{acos}{\left(\frac{e^{c}}{\sqrt{2 y + 1}} \right)}\right)} - 2 \pi\right)$$
-(i*im(acos(exp(c)/sqrt(1 + 2*y))) + re(acos(exp(c)/sqrt(1 + 2*y))))*(-2*pi + i*im(acos(exp(c)/sqrt(1 + 2*y))) + re(acos(exp(c)/sqrt(1 + 2*y))))