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ln(cos(1.55-0.31x))=-4.109 la ecuación

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Solución numérica:

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Solución

Ha introducido [src]
   /   /31   31*x\\   -4109 
log|cos|-- - ----|| = ------
   \   \20   100 //    1000 
$$\log{\left(\cos{\left(\frac{31}{20} - \frac{31 x}{100} \right)} \right)} = - \frac{4109}{1000}$$
Gráfica
Respuesta rápida [src]
                 / -4109 \
                 | ------|
                 |  1000 |
         100*acos\e      /
x1 = 5 + -----------------
                 31       
$$x_{1} = 5 + \frac{100 \operatorname{acos}{\left(e^{- \frac{4109}{1000}} \right)}}{31}$$
                 / -4109 \         
                 | ------|         
                 |  1000 |         
         100*acos\e      /   200*pi
x2 = 5 - ----------------- + ------
                 31            31  
$$x_{2} = - \frac{100 \operatorname{acos}{\left(e^{- \frac{4109}{1000}} \right)}}{31} + 5 + \frac{200 \pi}{31}$$
x2 = -100*acos(exp(-4109/1000))/31 + 5 + 200*pi/31
Suma y producto de raíces [src]
suma
            / -4109 \               / -4109 \         
            | ------|               | ------|         
            |  1000 |               |  1000 |         
    100*acos\e      /       100*acos\e      /   200*pi
5 + ----------------- + 5 - ----------------- + ------
            31                      31            31  
$$\left(5 + \frac{100 \operatorname{acos}{\left(e^{- \frac{4109}{1000}} \right)}}{31}\right) + \left(- \frac{100 \operatorname{acos}{\left(e^{- \frac{4109}{1000}} \right)}}{31} + 5 + \frac{200 \pi}{31}\right)$$
=
     200*pi
10 + ------
       31  
$$10 + \frac{200 \pi}{31}$$
producto
/            / -4109 \\ /            / -4109 \         \
|            | ------|| |            | ------|         |
|            |  1000 || |            |  1000 |         |
|    100*acos\e      /| |    100*acos\e      /   200*pi|
|5 + -----------------|*|5 - ----------------- + ------|
\            31       / \            31            31  /
$$\left(5 + \frac{100 \operatorname{acos}{\left(e^{- \frac{4109}{1000}} \right)}}{31}\right) \left(- \frac{100 \operatorname{acos}{\left(e^{- \frac{4109}{1000}} \right)}}{31} + 5 + \frac{200 \pi}{31}\right)$$
=
   /            / -4109 \\ /            / -4109 \        \
   |            | ------|| |            | ------|        |
   |            |  1000 || |            |  1000 |        |
25*\31 + 20*acos\e      //*\31 - 20*acos\e      / + 40*pi/
----------------------------------------------------------
                           961                            
$$\frac{25 \left(31 + 20 \operatorname{acos}{\left(e^{- \frac{4109}{1000}} \right)}\right) \left(- 20 \operatorname{acos}{\left(e^{- \frac{4109}{1000}} \right)} + 31 + 40 \pi\right)}{961}$$
25*(31 + 20*acos(exp(-4109/1000)))*(31 - 20*acos(exp(-4109/1000)) + 40*pi)/961
Respuesta numérica [src]
x1 = 20.2542384174099
x2 = 30.2824409837488
x3 = -0.014101283169456
x4 = 10.0141012831695
x4 = 10.0141012831695