Integral de cos^2(3x)*(sin(x)^2) dx
Solución
2 2 2 2 2 2 2 2 2 2 2 2
cos (1)*cos (3) cos (1)*sin (3) cos (3)*sin (1) sin (1)*sin (3) 9*sin (3)*cos(1)*sin(1) 7*cos (3)*cos(1)*sin(1) cos (1)*cos(3)*sin(3) 17*sin (1)*cos(3)*sin(3)
--------------- + --------------- + --------------- + --------------- - ----------------------- - ----------------------- - --------------------- + ------------------------
4 4 4 4 32 32 96 96
$$- \frac{7 \sin{\left(1 \right)} \cos{\left(1 \right)} \cos^{2}{\left(3 \right)}}{32} + \frac{17 \sin^{2}{\left(1 \right)} \sin{\left(3 \right)} \cos{\left(3 \right)}}{96} - \frac{9 \sin{\left(1 \right)} \sin^{2}{\left(3 \right)} \cos{\left(1 \right)}}{32} - \frac{\sin{\left(3 \right)} \cos^{2}{\left(1 \right)} \cos{\left(3 \right)}}{96} + \frac{\sin^{2}{\left(3 \right)} \cos^{2}{\left(1 \right)}}{4} + \frac{\sin^{2}{\left(1 \right)} \sin^{2}{\left(3 \right)}}{4} + \frac{\cos^{2}{\left(1 \right)} \cos^{2}{\left(3 \right)}}{4} + \frac{\sin^{2}{\left(1 \right)} \cos^{2}{\left(3 \right)}}{4}$$
=
2 2 2 2 2 2 2 2 2 2 2 2
cos (1)*cos (3) cos (1)*sin (3) cos (3)*sin (1) sin (1)*sin (3) 9*sin (3)*cos(1)*sin(1) 7*cos (3)*cos(1)*sin(1) cos (1)*cos(3)*sin(3) 17*sin (1)*cos(3)*sin(3)
--------------- + --------------- + --------------- + --------------- - ----------------------- - ----------------------- - --------------------- + ------------------------
4 4 4 4 32 32 96 96
$$- \frac{7 \sin{\left(1 \right)} \cos{\left(1 \right)} \cos^{2}{\left(3 \right)}}{32} + \frac{17 \sin^{2}{\left(1 \right)} \sin{\left(3 \right)} \cos{\left(3 \right)}}{96} - \frac{9 \sin{\left(1 \right)} \sin^{2}{\left(3 \right)} \cos{\left(1 \right)}}{32} - \frac{\sin{\left(3 \right)} \cos^{2}{\left(1 \right)} \cos{\left(3 \right)}}{96} + \frac{\sin^{2}{\left(3 \right)} \cos^{2}{\left(1 \right)}}{4} + \frac{\sin^{2}{\left(1 \right)} \sin^{2}{\left(3 \right)}}{4} + \frac{\cos^{2}{\left(1 \right)} \cos^{2}{\left(3 \right)}}{4} + \frac{\sin^{2}{\left(1 \right)} \cos^{2}{\left(3 \right)}}{4}$$
cos(1)^2*cos(3)^2/4 + cos(1)^2*sin(3)^2/4 + cos(3)^2*sin(1)^2/4 + sin(1)^2*sin(3)^2/4 - 9*sin(3)^2*cos(1)*sin(1)/32 - 7*cos(3)^2*cos(1)*sin(1)/32 - cos(1)^2*cos(3)*sin(3)/96 + 17*sin(1)^2*cos(3)*sin(3)/96
Estos ejemplos se pueden aplicar para introducción de los límites de integración inferior y superior.