The minimum positive period of the function f (x) = sin2 (2x - π 4) is______ .

The minimum positive period of the function f (x) = sin2 (2x - π 4) is______ .

F (x) = sin2 (2x - π 4) = 1 − cos (4x − π 2) 2 according to the properties of trigonometric function, t = 2 π 4 = π 2, so the answer is: π 2