cos(2*x) cos(8*x) -------- - -------- 4 16
0.25*cos(2*x) - 0.0625*cos(8*x)
-cos(8*x) + 4*cos(2*x)
----------------------
16 -cos(8*x) + 4*cos(2*x)
----------------------
16 2 8 8 2 4 4 2 6 6 2
sin (x) cos (x) sin (x) cos (x) 35*cos (x)*sin (x) 7*cos (x)*sin (x) 7*cos (x)*sin (x)
- ------- - ------- - ------- + ------- - ------------------ + ----------------- + -----------------
4 16 16 4 8 4 4