Paul M. answered • 12/09/19

Learn "how to" do the math and why the "how to" works!

Graph the 2 functions.

You will see that the area involved splits into 2 identical areas.

So integrate cos x-sinx from 0 to pi/4.

The area you want is simply double the value of the integral.

Drew M.

My mistake I was suppose to put (-sinx) instead of positive. Either way my answer was 2. I hope this was right!12/09/19