Shift the image of function y = 1 / 2Sin (2x - π / 4) to the left____ The function y = 1 / 2Sin (2x) is obtained by using two units Is it π / 4 or π / 8?

Shift the image of function y = 1 / 2Sin (2x - π / 4) to the left____ The function y = 1 / 2Sin (2x) is obtained by using two units Is it π / 4 or π / 8?

So easy. Of course, it's Wu / 8. The abscissa image moves left, so 2 should be put forward