I need help with desmos
given the function [tex]f(x)=cos(x+1)+sin(x-2)[/tex]
with the interval: [tex][-\frac{\pi}{2},\frac{\pi}{2}][/tex]
Subintervals(number of sections): 12
Estimate the area under the curve using trapezoid approximation.
I did it with left endpoint approximation (graph is attached)
but i cant figure out how to make the rectangles into trapezoids.
I calculated the sum of the trapezoid approximation which is roughly -0.734 square units

I just need help with what to put into desmos to get the trapezoids.