Unit Circle Definition of Sine, Cosine and Tangent

In this post, we understand the unit circle definition of cos(\theta) , sin(\theta) and tan(\theta) and periodicity using degrees and radians, as a part of the QCE Maths Methods course under the topic Trigonometric Functions 2 and sub-part Cosine, Tangent and Sine rules.

Unit Circle

Part 1: Unit circle definition

Part 2: Remembering the unit circle