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Resolución de integrales/ x*sinx/ x*sinx*cos(2x/pi)

Integral de x*sinx*cos(2x/pi) dx

Límites de integración:

interior superior
v

Gráfico:

interior superior

Definida a trozos:

Solución

Ha introducido [src] 
 pi                     
  /                     
 |                      
 |              /2*x\   
 |  x*sin(x)*cos|---| dx
 |              \ pi/   
 |                      
/                       
0
$$\int\limits_{0}^{\pi} x \sin{\left(x \right)} \cos{\left(\frac{2 x}{\pi} \right)}\, dx$$ 
Integral((x*sin(x))*cos((2*x)/pi), (x, 0, pi))
Respuesta (Indefinida) [src] 
  /                               4    /    2*x\        4    /    2*x\         3    /    2*x\        2    /    2*x\        2    /    2*x\        3    /    2*x\        4    /    2*x\        4    /    2*x\             /    2*x\         3    /    2*x\         3    /    2*x\         2    /    2*x\         2    /    2*x\             /    2*x\
 |                              pi *sin|x - ---|      pi *sin|x + ---|     4*pi *sin|x + ---|    4*pi *sin|x - ---|    4*pi *sin|x + ---|    4*pi *sin|x - ---|    x*pi *cos|x - ---|    x*pi *cos|x + ---|   8*pi*x*cos|x + ---|   2*x*pi *cos|x - ---|   2*x*pi *cos|x + ---|   4*x*pi *cos|x - ---|   4*x*pi *cos|x + ---|   8*pi*x*cos|x - ---|
 |             /2*x\                   \     pi/             \     pi/              \     pi/             \     pi/             \     pi/             \     pi/             \     pi/             \     pi/             \     pi/              \     pi/              \     pi/              \     pi/              \     pi/             \     pi/
 | x*sin(x)*cos|---| dx = C + ------------------- + ------------------- - ------------------- + ------------------- + ------------------- + ------------------- - ------------------- - ------------------- - ------------------- - -------------------- + -------------------- + -------------------- + -------------------- + -------------------
 |             \ pi/                    2       4             2       4             2       4             2       4             2       4             2       4             2       4             2       4             2       4             2       4              2       4              2       4              2       4              2       4
 |                            32 - 16*pi  + 2*pi    32 - 16*pi  + 2*pi    32 - 16*pi  + 2*pi    32 - 16*pi  + 2*pi    32 - 16*pi  + 2*pi    32 - 16*pi  + 2*pi    32 - 16*pi  + 2*pi    32 - 16*pi  + 2*pi    32 - 16*pi  + 2*pi    32 - 16*pi  + 2*pi     32 - 16*pi  + 2*pi     32 - 16*pi  + 2*pi     32 - 16*pi  + 2*pi     32 - 16*pi  + 2*pi 
/
$$\int x \sin{\left(x \right)} \cos{\left(\frac{2 x}{\pi} \right)}\, dx = C - \frac{\pi^{4} x \cos{\left(- \frac{2 x}{\pi} + x \right)}}{- 16 \pi^{2} + 32 + 2 \pi^{4}} - \frac{2 \pi^{3} x \cos{\left(- \frac{2 x}{\pi} + x \right)}}{- 16 \pi^{2} + 32 + 2 \pi^{4}} + \frac{8 \pi x \cos{\left(- \frac{2 x}{\pi} + x \right)}}{- 16 \pi^{2} + 32 + 2 \pi^{4}} + \frac{4 \pi^{2} x \cos{\left(- \frac{2 x}{\pi} + x \right)}}{- 16 \pi^{2} + 32 + 2 \pi^{4}} - \frac{\pi^{4} x \cos{\left(\frac{2 x}{\pi} + x \right)}}{- 16 \pi^{2} + 32 + 2 \pi^{4}} - \frac{8 \pi x \cos{\left(\frac{2 x}{\pi} + x \right)}}{- 16 \pi^{2} + 32 + 2 \pi^{4}} + \frac{4 \pi^{2} x \cos{\left(\frac{2 x}{\pi} + x \right)}}{- 16 \pi^{2} + 32 + 2 \pi^{4}} + \frac{2 \pi^{3} x \cos{\left(\frac{2 x}{\pi} + x \right)}}{- 16 \pi^{2} + 32 + 2 \pi^{4}} + \frac{4 \pi^{2} \sin{\left(- \frac{2 x}{\pi} + x \right)}}{- 16 \pi^{2} + 32 + 2 \pi^{4}} + \frac{\pi^{4} \sin{\left(- \frac{2 x}{\pi} + x \right)}}{- 16 \pi^{2} + 32 + 2 \pi^{4}} + \frac{4 \pi^{3} \sin{\left(- \frac{2 x}{\pi} + x \right)}}{- 16 \pi^{2} + 32 + 2 \pi^{4}} - \frac{4 \pi^{3} \sin{\left(\frac{2 x}{\pi} + x \right)}}{- 16 \pi^{2} + 32 + 2 \pi^{4}} + \frac{4 \pi^{2} \sin{\left(\frac{2 x}{\pi} + x \right)}}{- 16 \pi^{2} + 32 + 2 \pi^{4}} + \frac{\pi^{4} \sin{\left(\frac{2 x}{\pi} + x \right)}}{- 16 \pi^{2} + 32 + 2 \pi^{4}}$$
Simplificar
Gráfica
Trazar el gráfico f(x)
Respuesta [src] 
     5                   3                  3         
   pi *cos(2)        4*pi *cos(2)       4*pi *sin(2)  
---------------- - ---------------- + ----------------
       4       2          4       2          4       2
16 + pi  - 8*pi    16 + pi  - 8*pi    16 + pi  - 8*pi
$$\frac{\pi^{5} \cos{\left(2 \right)}}{- 8 \pi^{2} + 16 + \pi^{4}} - \frac{4 \pi^{3} \cos{\left(2 \right)}}{- 8 \pi^{2} + 16 + \pi^{4}} + \frac{4 \pi^{3} \sin{\left(2 \right)}}{- 8 \pi^{2} + 16 + \pi^{4}}$$ 
=
= 
     5                   3                  3         
   pi *cos(2)        4*pi *cos(2)       4*pi *sin(2)  
---------------- - ---------------- + ----------------
       4       2          4       2          4       2
16 + pi  - 8*pi    16 + pi  - 8*pi    16 + pi  - 8*pi
$$\frac{\pi^{5} \cos{\left(2 \right)}}{- 8 \pi^{2} + 16 + \pi^{4}} - \frac{4 \pi^{3} \cos{\left(2 \right)}}{- 8 \pi^{2} + 16 + \pi^{4}} + \frac{4 \pi^{3} \sin{\left(2 \right)}}{- 8 \pi^{2} + 16 + \pi^{4}}$$ 
pi^5*cos(2)/(16 + pi^4 - 8*pi^2) - 4*pi^3*cos(2)/(16 + pi^4 - 8*pi^2) + 4*pi^3*sin(2)/(16 + pi^4 - 8*pi^2)
Respuesta numérica [src] 
1.0750890351302
1.0750890351302

    Estos ejemplos se pueden aplicar para introducción de los límites de integración inferior y superior.

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