A) By definition, you have that the period of the y=aCos(bx) is: Period=2π/|b| b=2π/3 Period=2π/(2π/3) Period=3 b) The amplitude of y=aCos(bx) is: Amplitude=|a| Amplitude=1/4 c) The mideline represents the horintal line that passes between the maximum and minimum points. In the equation y=aCos(bx) the mideline is: y=0
