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Problème

w, start subscript, 1, end subscript, equals, 14, open bracket, cosine, left parenthesis, 273, degree, right parenthesis, plus, i, sine, left parenthesis, 273, degree, right parenthesis, close bracket
w, start subscript, 2, end subscript, equals, 4, open bracket, cosine, left parenthesis, 3, degree, right parenthesis, plus, i, sine, left parenthesis, 3, degree, right parenthesis, close bracket
Calculer le produit de w, start subscript, 1, end subscript et w, start subscript, 2, end subscript.
On demande sa forme trigonométrique.
w, start subscript, 1, end subscript, times, w, start subscript, 2, end subscript, equals
Objectif : 4 exercices