Labels:text | font | screenshot | rectangle OCR: cos(o.(k+1)) = = [cos((k .- 1)o) + cos((k+1)o)) == {cos((k-1)()-cos((k+])c)} 2. = cos(ko) cos(o) -sin(ka )sin(a) sin(o(k+1)) == {sin((k-1)a)+sin((k+1)a)} == [-sin((k-1)(x)+sin((k+1)a)} = sin ( ka) cos( a) - cos( ka ) sin(a) Example 5: Deriving cos (a( k+1)) and sin (a( k+1)) from a table of constants.
