4.3.87 - Angular displacement

Be able to express angular displacement in radians and in degrees, and convert between these units.

Use - angular displacement to connect the rule to the data and decision in the question.

This matters because - angular displacement determines what can be inferred or chosen; begin with the stated conditions and keep the conclusion tied to the evidence.

Example: apply - angular displacement to one small, clearly defined case, show the key step or comparison, and explain the result in words.

Boundary: - Angular displacement is not a universal recommendation. Check the syllabus scope, assumptions, units and the limits of the evidence before generalising.