Expression 4: left parenthesis, StartFraction, pi Over 6 , EndFraction , "f" prime left parenthesis, StartFraction, pi Over 6 , EndFraction , right parenthesis , right parenthesisπ6,f′π6
4
Expression 5: "y" equals "f" prime left parenthesis, "x" , right parenthesisy=f′x
5
Expression 6: "g" left parenthesis, "x" , right parenthesis equals sine left parenthesis, 2 "x" , right parenthesis minus "x"gx=sin2x−x