Sr Examen

ctg(y)=x la ecuación

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Solución numérica:

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Solución

Ha introducido [src]
cot(y) = x
$$\cot{\left(y \right)} = x$$
Solución detallada
Tenemos la ecuación
$$\cot{\left(y \right)} = x$$
cambiamos
$$- x + \cot{\left(y \right)} - 1 = 0$$
$$- x + \cot{\left(y \right)} - 1 = 0$$
Sustituimos
$$w = \cot{\left(y \right)}$$
Transportamos los términos libres (sin w)
del miembro izquierdo al derecho, obtenemos:
$$w - x = 1$$
Move the summands with the other variables
del miembro izquierdo al derecho, obtenemos:
$$w = x + 1$$
Obtenemos la respuesta: w = 1 + x
hacemos cambio inverso
$$\cot{\left(y \right)} = w$$
sustituimos w:
Gráfica
Respuesta rápida [src]
                sin(2*re(y))                  I*sinh(2*im(y))       
x1 = - ----------------------------- - -----------------------------
       -cosh(2*im(y)) + cos(2*re(y))   -cosh(2*im(y)) + cos(2*re(y))
$$x_{1} = - \frac{\sin{\left(2 \operatorname{re}{\left(y\right)} \right)}}{\cos{\left(2 \operatorname{re}{\left(y\right)} \right)} - \cosh{\left(2 \operatorname{im}{\left(y\right)} \right)}} - \frac{i \sinh{\left(2 \operatorname{im}{\left(y\right)} \right)}}{\cos{\left(2 \operatorname{re}{\left(y\right)} \right)} - \cosh{\left(2 \operatorname{im}{\left(y\right)} \right)}}$$
x1 = -sin(2*re(y))/(cos(2*re(y)) - cosh(2*im(y))) - i*sinh(2*im(y))/(cos(2*re(y)) - cosh(2*im(y)))
Suma y producto de raíces [src]
suma
           sin(2*re(y))                  I*sinh(2*im(y))       
- ----------------------------- - -----------------------------
  -cosh(2*im(y)) + cos(2*re(y))   -cosh(2*im(y)) + cos(2*re(y))
$$- \frac{\sin{\left(2 \operatorname{re}{\left(y\right)} \right)}}{\cos{\left(2 \operatorname{re}{\left(y\right)} \right)} - \cosh{\left(2 \operatorname{im}{\left(y\right)} \right)}} - \frac{i \sinh{\left(2 \operatorname{im}{\left(y\right)} \right)}}{\cos{\left(2 \operatorname{re}{\left(y\right)} \right)} - \cosh{\left(2 \operatorname{im}{\left(y\right)} \right)}}$$
=
           sin(2*re(y))                  I*sinh(2*im(y))       
- ----------------------------- - -----------------------------
  -cosh(2*im(y)) + cos(2*re(y))   -cosh(2*im(y)) + cos(2*re(y))
$$- \frac{\sin{\left(2 \operatorname{re}{\left(y\right)} \right)}}{\cos{\left(2 \operatorname{re}{\left(y\right)} \right)} - \cosh{\left(2 \operatorname{im}{\left(y\right)} \right)}} - \frac{i \sinh{\left(2 \operatorname{im}{\left(y\right)} \right)}}{\cos{\left(2 \operatorname{re}{\left(y\right)} \right)} - \cosh{\left(2 \operatorname{im}{\left(y\right)} \right)}}$$
producto
           sin(2*re(y))                  I*sinh(2*im(y))       
- ----------------------------- - -----------------------------
  -cosh(2*im(y)) + cos(2*re(y))   -cosh(2*im(y)) + cos(2*re(y))
$$- \frac{\sin{\left(2 \operatorname{re}{\left(y\right)} \right)}}{\cos{\left(2 \operatorname{re}{\left(y\right)} \right)} - \cosh{\left(2 \operatorname{im}{\left(y\right)} \right)}} - \frac{i \sinh{\left(2 \operatorname{im}{\left(y\right)} \right)}}{\cos{\left(2 \operatorname{re}{\left(y\right)} \right)} - \cosh{\left(2 \operatorname{im}{\left(y\right)} \right)}}$$
=
-(I*sinh(2*im(y)) + sin(2*re(y))) 
----------------------------------
  -cosh(2*im(y)) + cos(2*re(y))   
$$- \frac{\sin{\left(2 \operatorname{re}{\left(y\right)} \right)} + i \sinh{\left(2 \operatorname{im}{\left(y\right)} \right)}}{\cos{\left(2 \operatorname{re}{\left(y\right)} \right)} - \cosh{\left(2 \operatorname{im}{\left(y\right)} \right)}}$$
-(i*sinh(2*im(y)) + sin(2*re(y)))/(-cosh(2*im(y)) + cos(2*re(y)))