Nombres Complexes, Équations Polynomiales : Correction 16, Terminale Technologique
x 0 π/6 π/4 π/3 π/2 π π
cos(x) 1 3/2 2/2 1/2 0 -1 1
sin(x) 0 1/2 2/2 3/2 1 0 0
Exercice
16
z4 + 4 z2 + 16 = 0
z4 + 4 z2 + 16 = 0