Double Angle Identities & Formulas of Sin, Cos & Tan - Trigonometry

This trigonometry video tutorial provides a basic introduction to the double angle identities of sine, cosine, and tangent.  It explains how to derive the double angle formulas from the sum and difference identities of sin, cos, and tan and how to use the double angle formulas to find the exact value of trigonometric expressions using right triangle trigonometry and SOHCAHTOA.  This video contains many examples and practice problems for you to learn this material.  

Bearing Problems and Navigation:                  
Bearing Problems & Navigation

Two Triangle Problems - More Examples:      
Trigonometry - How To Solve Right Tri...

Verifying Trigonometric Identities:                      
Verifying Trigonometric Identities

Sum and Difference Identities:                            
Sum and Difference Identities of Sine...

Verifying Trig Identities With Double Angles:    
Verifying Trigonometric Identities Wi...

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Power Reducing Formulas:                                  
Simplifying Trigonometric Expressions...

Half Angle Formulas:                                            
Half Angle Formulas & Identities - Ev...

Verifying Trig Identities Using Half Angles:        
Verifying Trigonometric Identities Us...

Inverse Trig Functions With Double Angles:      
Inverse Trig Functions With Double An...

Right Triangle Trig With Half Angle Identities:  
Right Triangle Trigonometry and Half ...

Product To Sum + Sum to Product Formulas:  
Product To Sum Identities and Sum To ...

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Solving Trig Equations - Finding All Solutions:  
Solving Trigonometric Equations By Fi...

Solving Trig Equations With Multiple Angles:    
How To Solve Trigonometric Equations ...

Solving Trig Equations With Double Angles:      
Solving Trigonometric Equations By Fa...

Trigonometry Final Exam Review:                      
Trigonometry Final Exam Review

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