Numere complexe: forma trigonometrică

$\displaystyle 1 + i$

I

$\displaystyle \sqrt{2}$

$\displaystyle \dfrac{\pi}{4}$

$\displaystyle \sqrt{2}\left(\cos\dfrac{\pi}{4} + i\sin\dfrac{\pi}{4}\right)$

$\displaystyle -1 + i\sqrt{3}$

II

$\displaystyle 2$

$\displaystyle \dfrac{2\pi}{3}$

$\displaystyle 2\left(\cos\dfrac{2\pi}{3} + i\sin\dfrac{2\pi}{3}\right)$

$\displaystyle -2$

pe axă

$\displaystyle 2$

$\displaystyle \pi$

$\displaystyle 2(\cos\pi + i\sin\pi)$

$\displaystyle -3i$

pe axă

$\displaystyle 3$

$\displaystyle \dfrac{3\pi}{2}$

$\displaystyle 3\left(\cos\dfrac{3\pi}{2} + i\sin\dfrac{3\pi}{2}\right)$