Expression 4: "y" equals 0.5sine left parenthesis, 3 "x" , right parenthesis left brace, negative 8 less than or equal to "x" less than or equal to 8 , right bracey=0.5sin3x−8≤x≤8
4
Expression 5: "y" less than 0.5sine left parenthesis, 3 "x" , right parenthesis left brace, "y" greater than negative 2 , right brace left brace, negative 8 less than or equal to "x" less than or equal to 8 , right bracey<0.5sin3xy>−2−8≤x≤8