Problème

Écrire z, start subscript, 1, end subscript, equals, 14, open bracket, cosine, left parenthesis, start fraction, pi, divided by, 2, end fraction, right parenthesis, plus, i, sine, left parenthesis, start fraction, pi, divided by, 2, end fraction, right parenthesis, close bracket sous forme algébrique.
On demande des valeurs exactes.
z, start subscript, 1, end subscript, equals
Objectif : 4 exercices