Circular functions

Mathematical Methods: Units 1 and 2

Lesson notes

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Chapters

Introduction

Description

Why do we need an angle system other than degrees? Why are there even other angle systems? What is a radian anyway? Why do we need radians? Where did the idea of having 360 degrees in a circle come from? All of these questions (and more) and answered in this video!
This video looks at what a radian is and why would need it when we have degrees. I look at the unit circle and how we can use it to define what a radian is and then look at converting between radians and degrees.
Passing through the idea of notation there are then a number of worked examples where we convert between degrees to radians and radians to degrees.
There is also the usual MaffsGuru humour - which is generally not funny - but spends rather too long asking for people to subscribe. This is needy maths!
Hope you enjoy it!

Video tags

radians to degrees
radians unit circle
radians to degrees conversion
radians vs degrees
radians and arc length
what is a radian in math
what is a radian video
what is a radian measure
how do i convert degrees to radians
what is the unit circle and how do we use it
what is the unit circle used for
Methods 1 and 2
Degrees and radians
unit circle