From the 2007 HSC exam: Question 7, (b) (ii)
http://www.boardofstudies.nsw.edu.au/hsc_exams/exam-papers-2007/pdf_doc/maths-07.pdf
I'm having trouble finding the shaded area between the sin and cos graph because part of the area is above the x-axis, and some is below. As well as this, the two...