(niveau première)

Bonjour,
Je n'arrive pas à répondre à ce que l'on me demande de faire dans un exercice. Pourriez-vous m'aider s'il vous plaît ?

Voici ce que l'on me demande:
"Démontrez que sin(2α) = 2 cos(α) sin(α)"

Merci d'avance.

By: USER6126
26 Agustus 2025 mathematiques 5 minutes
4.5
282 views 282 comments 13 shares

Question

Grade: Education Subject: mathematiques
(niveau première)

Bonjour,
Je n'arrive pas à répondre à ce que l'on me demande de faire dans un exercice. Pourriez-vous m'aider s'il vous plaît ?

Voici ce que l'on me demande:
"Démontrez que sin(2α) = 2 cos(α) sin(α)"

Merci d'avance.
Asked by:
282 Viewed 282 Answers

Answer (282)

Best Answer
(53)

car a+a=2a

alors sin(2a)=2 cos(a) sin(a)

Answered on 26 Agustus 2025

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