Algebriac and Trigonometric Formulas

• example (d)

  
  
  cos(z) = sin(z)
  

• exp(0), exp(infinity), exp(-infinity)

  
  

• sin(z) = 1 / 2i * [exp(iz)-exp(-iz)]

• cos(z) = 1 / 2 * [exp(iz)-exp(-iz)]

  
  

• exp(2öki) = 1 for any integer k

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