pi -- 3 / | | 3 | cos (x)*sin(2*x) dx | / 0
Integral(cos(x)^3*sin(2*x), (x, 0, pi/3))
/ | 5 | 3 2*cos (x) | cos (x)*sin(2*x) dx = C - --------- | 5 /
0.3875
Use the examples entering the upper and lower limits of integration.