Trigonometry - What Exactly Is a Radian?

This trigonometry video tutorial explains what exactly a radian is using angle measures, the radius, circumference, and arc length of a circle.  This video also explains how to convert from radians to degrees and degrees to radians.

Trigonometry - Basic Introduction:                  
Trigonometry

Introduction to Angles:                                      
Introduction to Angles

Radians and Degrees:                                        
Radians and Degrees

What Exactly Is a Radian?                                
Trigonometry - What Exactly Is a Radian?

Coterminal Angles:                                            
Coterminal Angles In Radians & Degree...

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Decimal Degrees to DMS:                                  
Decimal Degrees to DMS Formula -  Con...

Arc Length of a Circle and Sector Area:          
Arc Length of a Circle Formula - Sect...

Linear Speed and Angular Velocity:                
Linear Speed and Angular Velocity

Clock to Angle Problems:                                  
Clock Aptitude Reasoning Tricks & Pro...

The Unit Circle:                                                    
The Unit Circle, Basic Introduction, ...

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