1 / | | sin(2*x)*sin(4*x) dx | / 0
1 / | cos(4)*sin(2) cos(2)*sin(4) | sin(2*x)*sin(4*x) dx = - ------------- + ------------- | 3 6 / 0
0.250608981556331
/ | cos(4*x)*sin(2*x) cos(2*x)*sin(4*x) | sin(2*x)*sin(4*x) dx = C - ----------------- + ----------------- | 3 6 /