CAIE AS 9709 Maths Trigonometry animated powerpoint with Geogebra add-ins. Values and patterns of the trig functions, rules and transformations. Radian. 19 slides. Explore all three main functions using the GeoGebra add-ins, including mapping the functions to rotation around the unit circle, transforming the functions by adjusting all four coefficients, and wrapping a radius (multiple) around a circle to see how the radian is defined.