Résoudre dans \(\C\) :
1
\(\cos z = 2\).
2
\(\ch z = -1\).
3
\(\sin z + \sin jz + \sin j^2z = 0\).
4
\(8\cos z + 4i\sin z = 7 + 5i\).
Résoudre dans \(\C\) :
\(\cos z = 2\).
\(\ch z = -1\).
\(\sin z + \sin jz + \sin j^2z = 0\).
\(8\cos z + 4i\sin z = 7 + 5i\).