In order to get the image of function y = cos (2x + π 3), we only need to change the image of function y = cos 2x to___ Parallel movement___ A unit

In order to get the image of function y = cos (2x + π 3), we only need to change the image of function y = cos 2x to___ Parallel movement___ A unit

∵ y = cos2x image translation to the left, π 6y = Cos2 (x + π 6) = cos (2x + π 3), so the answer is: left, π 6