All this means is that we are going to shift our entire graph up by 1 unit along the y axis. Step 5: For our last transformation, we have a vertical phase shift up 1 unit. Shift our graph y=2cos(x) over by 90º to the left to get y=2cos(x+(π/2)) To do this, we need to look at where negative (π/2) is on our graph at (-π/2) and move our entire graph over to start at this new point, “shifting” over each coordinate point by (π/2) along the x axis. Step 4: Next, we can apply our horizontal shift to the left by (π/2) or 90º.
Re-draw y=cos(x), with an amplitude of 2 to get y=2cos(x)
