Integral de (e^x-1)*cos(kx) dx
Solución
Respuesta (Indefinida)
[src]
/
| // x for k = 0\ / / x x \\
| / x \ || | | x |cos(k*x)*e k*e *sin(k*x)|| x
| \E - 1/*cos(k*x) dx = C - |
$$\int \left(e^{x} - 1\right) \cos{\left(k x \right)}\, dx = C + k \left(- k \left(\frac{k e^{x} \sin{\left(k x \right)}}{k^{2} + 1} + \frac{e^{x} \cos{\left(k x \right)}}{k^{2} + 1}\right) + e^{x} \sin{\left(k x \right)}\right) - \begin{cases} x & \text{for}\: k = 0 \\\frac{\sin{\left(k x \right)}}{k} & \text{otherwise} \end{cases} + e^{x} \cos{\left(k x \right)}$$
/ 2*pi
| -1 - 2*pi + e for k = 0
|
| 2 2*pi 2 2*pi
< k sin(2*pi*k) k *sin(2*pi*k) k*cos(2*pi*k)*e k *e *sin(2*pi*k)
|- ------ - ----------- - -------------- + ------------------- + -------------------- otherwise
| 3 3 3 3 3
| k + k k + k k + k k + k k + k
\
$$\begin{cases} - 2 \pi - 1 + e^{2 \pi} & \text{for}\: k = 0 \\- \frac{k^{2} \sin{\left(2 \pi k \right)}}{k^{3} + k} + \frac{k^{2} e^{2 \pi} \sin{\left(2 \pi k \right)}}{k^{3} + k} + \frac{k e^{2 \pi} \cos{\left(2 \pi k \right)}}{k^{3} + k} - \frac{k}{k^{3} + k} - \frac{\sin{\left(2 \pi k \right)}}{k^{3} + k} & \text{otherwise} \end{cases}$$
=
/ 2*pi
| -1 - 2*pi + e for k = 0
|
| 2 2*pi 2 2*pi
< k sin(2*pi*k) k *sin(2*pi*k) k*cos(2*pi*k)*e k *e *sin(2*pi*k)
|- ------ - ----------- - -------------- + ------------------- + -------------------- otherwise
| 3 3 3 3 3
| k + k k + k k + k k + k k + k
\
$$\begin{cases} - 2 \pi - 1 + e^{2 \pi} & \text{for}\: k = 0 \\- \frac{k^{2} \sin{\left(2 \pi k \right)}}{k^{3} + k} + \frac{k^{2} e^{2 \pi} \sin{\left(2 \pi k \right)}}{k^{3} + k} + \frac{k e^{2 \pi} \cos{\left(2 \pi k \right)}}{k^{3} + k} - \frac{k}{k^{3} + k} - \frac{\sin{\left(2 \pi k \right)}}{k^{3} + k} & \text{otherwise} \end{cases}$$
Piecewise((-1 - 2*pi + exp(2*pi), k = 0), (-k/(k + k^3) - sin(2*pi*k)/(k + k^3) - k^2*sin(2*pi*k)/(k + k^3) + k*cos(2*pi*k)*exp(2*pi)/(k + k^3) + k^2*exp(2*pi)*sin(2*pi*k)/(k + k^3), True))
Estos ejemplos se pueden aplicar para introducción de los límites de integración inferior y superior.