This is not included in the Pearson textbook but it is included in the specification, although only in the guidance. Students will be expected to be able to evaluate the area of a region bounded by a curve and given straight lines, or between two curves. This includes curves defined parametrically. One of the students I tutor told me they had completed the syllabus at school but they haven't done this. I just thought I should point out that it is required, in case anyone has missed this. I don't know why it's not in the textbook, it used to be in C4.