Draw a graphic window vertically in two parts and draw a graphic in the left part functions f1 (x) with dashed line of black color, and in the right function f2 (x) by crosses green color. Observe the variable x in the interval [-pi/4, pi/4] f1(x)=

Here is what i wrote, y1 and y2 i think i made mistake but i am nost sure where. I would be thankful if you correct me , sorry for bad engilsh.

[John D'Errico]

If you show what you did, then this becomes a question about MATLAB. So far, nothing has been shown.