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Go to solution Solved by PrairieMeuhmeuh,

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Posted

Et bonjour, petite question est ce que F(-X)= cos(-x+PIE/6) = Cos(x+Pie/6) 

Car en tant normale ça marche avec cos(X) mais je ne sais pas trop pour cos(x+ 2KPIE)

Pouvez-vous m'éclairer ? 

  • Solution
Posted

Coucou @camcam09

 

Alors non cos(-x + П/6) \neq cos(x + П/6)

 

Par exemple tu remplaces x par П/6 :

  • cos(-x + П/6) = cos(- П/6 + П/6) = cos(0) 
  • cos(x + П/6) =cos(П/6 + П/6) = cos (2П/6) = cos(П/3)

 

Ce sont donc deux résultats différents

 

J'espère que c'est plus clair pour toi! 🙃

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