The first section recaps the core skills of trigonometry from IGCSE including sine / cosine rule and area of a triangle which are needed for the exam questions.
The second section introduces the concept of radians and how to convert between them and degrees.
The third section then shows the formulae for arc length and sector area when working in radians, which is needed for the problem solving style exam questions.
P1.09 Circular Measure.pptx