Updated Guidance for Teaching.
Having worked with the specification, further clarification on depth of content and requirements have been added to the Guidance for Teaching.
• FN1: the symbol ≈ may be used to show an approximate relationship
• FR1: imperial conversions will be stated in the question if needed
• HG22: the ambiguous case of the sine rule will not be assessed
• HN8: rationalising denominators includes monomial and binomial denominators