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[Index]

Introduction
Essence
Memorizing
How to memorize
Basic Formulas
Sum and Difference Formulas
Double & Triple Angle Formulas
Half Angle Formulas
Product to Sum Formulas
Sum to Product Formulas
All Formulas
Understanding
Page 1
Page 2
Page 3
Page 4
Page 5
Summarizing
Page 1
Page 2
Examples
Examples
Example 1
Example 2
Example 3
Example 4
Example 5
Example 6
Example 7
Example 8
General ideas
Exercises
Final thoughts
     
make it simple
Page 1 | Page 2 | Proof(s)

Proofs of example 2:

6_2101.gif (2135 bytes)

First proof: 6_2p01.gif (10679 bytes)
Second proof: 6_2p02.gif (6270 bytes)
                                                                                                                                                                                                                                                                                                                        
     
  

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