Trigonometry (Continued)


   
 
Napier's Analogy
Theorem :
 
In any triangle ABC, with sides a = BC, b = CA and c = BA, then prove that
 
 
 
 
Proof:
 
Method I
 
 
 
 
 
 
 
 
Similarly, (ii) and (iii) can be proved.
 
Method II
 
 
 
 
 
 
 
  
     
   
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