0.25*sin(2*x) - 0.0625*sin(8*x)
-sin(8*x) + 4*sin(2*x) ---------------------- 16
7 3 5 7 5 3 sin (x)*cos(x) cos(x)*sin(x) 7*cos (x)*sin (x) cos (x)*sin(x) 7*cos (x)*sin (x) -------------- + ------------- - ----------------- - -------------- + ----------------- 2 2 2 2 2