Creating horizontal regions between functions

I tried doing it, but i kept getting it wrong, can you help and tell me what my mistake is.

f = @(x) cos(x); 
g = @(x) x-x;
a = 0;
b =1;
fplot(f, [a, pi/2]), hold on
fplot(g, [a, pi/2], 'LineWidth',2)
ycoord = linspace(a, b, 20);
xcoord = [f(ycoord); g(ycoord)];
plot(xcoord, [ycoord;ycoord]), hold off

I used this code^^

but i want this

thanks.

Answer 1

[Walter Roberson]

Consider the top red line that you want. The x coordinates of the line should start from 0, but should end at the point where cos(x) = 0.95. So for any particular y coordinate, the ending x coordinate should be acos(y)