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Cosine: Expansions
(Math | Algebra | Functions | Expansions)

 

Cosine: Expansions

Series:
cos(x) = [sum (k=0..inf)] (-1)k x2k / (2k)!
= 1 - (1/2!)x2 + (1/4!)x4 - (1/6!)x6
(This can be derived from Taylor's Theorem.)

  
 
  

 
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