Intro to the Unit Circle

Introduction to the unit circle and sin/cos defined in terms of the unit circle. Designed for Year 10A Maths in Victoria, Australia, but could be adapted for use elsewhere. All angles are in degrees a° where 0 <= a < 360 Structure: * Introduce the idea of angles in the unit circle in degrees measured anticlockwise from (1,0) * Introduce the definition of sin/cos in terms of coordinates, for degrees only * Combine with some symmetry questions

By Julia Anker