alxdpc alxdpc
  • 14-11-2022
  • Mathematics
contestada

bonsoir je n'arrive pas cette question merci d'avance

44
1.
a. Compléter les pointillés avec « égaux » ou « opposés » :Les réels −π3 et π3 ont des cosinus … et des sinus…
b. En déduire les valeurs exactes de cos−π3 et sin−π3.
2.
Déterminer les valeurs exactes de cos8π3 et sin8π3.

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