Are small angle approximations included in the C4 specification?
Students are not expected to know small angle approximations for the exam it used to be in A Level but it is not currently in the national common core. However, teachers may well want to use small angle approximations when teaching differentiation of sin and cos so it is useful to have it in the book. The 2004 changes to the specification came soon after the 2000 changes and we were keen to future proof the books as much as possible at the time, in case of any further changes soon after, so this section in the C3/4 book was not marked as enrichment.
