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  1. import math
  2.  
  3. def cos(x, n):
  4.   formula = lambda k: (-1)**k * x**(2*k) / math.factorial(2*k)
  5.   soma = 0
  6.  
  7.   for k in range(n+1):
  8.     soma += formula(k)
  9.  
  10.   return soma
  11.  
  12. assert math.isclose(cos(0.5, 10), math.cos(0.5))
  13. assert math.isclose(cos(-0.5, 10), math.cos(-0.5))
  14. assert math.isclose(cos(0.0, 10), math.cos(0.0))
  15. assert math.isclose(cos(1.0, 10), math.cos(1.0))
Success #stdin #stdout 0.02s 9240KB
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https://ideone.com/MPhnlK
language:
Python 3 (python  3.9.5)
created:
4 years ago
visibility:
public

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