Expression 5: sine left parenthesis, "F" left parenthesis, "x" , right parenthesis , right parenthesis negative 2sinFx−2
5
Expression 6: "F" left parenthesis, "x" , right parenthesis equals "f" Subscript, 0 , Baseline "x" minus "f" Subscript, "d" , Baseline cosine left parenthesis, "x" , right parenthesisFx=f0x−fdcosx