Integral de (cos(2x))^2*(sin(x/2))^2 dx
Solución
Respuesta (Indefinida)
[src]
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| 2 2/x\ 2*sin (x) sin(x) x sin(4*x) 2*sin (x)
| cos (2*x)*sin |-| dx = C - --------- - ------ + - + -------- + ---------
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$$\int \sin^{2}{\left(\frac{x}{2} \right)} \cos^{2}{\left(2 x \right)}\, dx = C + \frac{x}{4} - \frac{2 \sin^{5}{\left(x \right)}}{5} + \frac{2 \sin^{3}{\left(x \right)}}{3} - \frac{\sin{\left(x \right)}}{2} + \frac{\sin{\left(4 x \right)}}{16}$$
2 2 2 2 2 2 2 2 2 2 2 2
cos (1/2)*cos (2) cos (1/2)*sin (2) cos (2)*sin (1/2) sin (1/2)*sin (2) 8*sin (2)*cos(1/2)*sin(1/2) 7*cos (2)*cos(1/2)*sin(1/2) cos (1/2)*cos(2)*sin(2) 31*sin (1/2)*cos(2)*sin(2)
----------------- + ----------------- + ----------------- + ----------------- - --------------------------- - --------------------------- - ----------------------- + --------------------------
4 4 4 4 15 15 120 120
$$- \frac{8 \sin{\left(\frac{1}{2} \right)} \sin^{2}{\left(2 \right)} \cos{\left(\frac{1}{2} \right)}}{15} - \frac{7 \sin{\left(\frac{1}{2} \right)} \cos{\left(\frac{1}{2} \right)} \cos^{2}{\left(2 \right)}}{15} + \frac{31 \sin^{2}{\left(\frac{1}{2} \right)} \sin{\left(2 \right)} \cos{\left(2 \right)}}{120} - \frac{\sin{\left(2 \right)} \cos^{2}{\left(\frac{1}{2} \right)} \cos{\left(2 \right)}}{120} + \frac{\sin^{2}{\left(\frac{1}{2} \right)} \cos^{2}{\left(2 \right)}}{4} + \frac{\cos^{2}{\left(\frac{1}{2} \right)} \cos^{2}{\left(2 \right)}}{4} + \frac{\sin^{2}{\left(\frac{1}{2} \right)} \sin^{2}{\left(2 \right)}}{4} + \frac{\sin^{2}{\left(2 \right)} \cos^{2}{\left(\frac{1}{2} \right)}}{4}$$
=
2 2 2 2 2 2 2 2 2 2 2 2
cos (1/2)*cos (2) cos (1/2)*sin (2) cos (2)*sin (1/2) sin (1/2)*sin (2) 8*sin (2)*cos(1/2)*sin(1/2) 7*cos (2)*cos(1/2)*sin(1/2) cos (1/2)*cos(2)*sin(2) 31*sin (1/2)*cos(2)*sin(2)
----------------- + ----------------- + ----------------- + ----------------- - --------------------------- - --------------------------- - ----------------------- + --------------------------
4 4 4 4 15 15 120 120
$$- \frac{8 \sin{\left(\frac{1}{2} \right)} \sin^{2}{\left(2 \right)} \cos{\left(\frac{1}{2} \right)}}{15} - \frac{7 \sin{\left(\frac{1}{2} \right)} \cos{\left(\frac{1}{2} \right)} \cos^{2}{\left(2 \right)}}{15} + \frac{31 \sin^{2}{\left(\frac{1}{2} \right)} \sin{\left(2 \right)} \cos{\left(2 \right)}}{120} - \frac{\sin{\left(2 \right)} \cos^{2}{\left(\frac{1}{2} \right)} \cos{\left(2 \right)}}{120} + \frac{\sin^{2}{\left(\frac{1}{2} \right)} \cos^{2}{\left(2 \right)}}{4} + \frac{\cos^{2}{\left(\frac{1}{2} \right)} \cos^{2}{\left(2 \right)}}{4} + \frac{\sin^{2}{\left(\frac{1}{2} \right)} \sin^{2}{\left(2 \right)}}{4} + \frac{\sin^{2}{\left(2 \right)} \cos^{2}{\left(\frac{1}{2} \right)}}{4}$$
cos(1/2)^2*cos(2)^2/4 + cos(1/2)^2*sin(2)^2/4 + cos(2)^2*sin(1/2)^2/4 + sin(1/2)^2*sin(2)^2/4 - 8*sin(2)^2*cos(1/2)*sin(1/2)/15 - 7*cos(2)^2*cos(1/2)*sin(1/2)/15 - cos(1/2)^2*cos(2)*sin(2)/120 + 31*sin(1/2)^2*cos(2)*sin(2)/120
Estos ejemplos se pueden aplicar para introducción de los límites de integración inferior y superior.