Binomial Theorem

$2^{n / 2}\left(\cos \frac{n \pi}{4}+i \sin \frac{n \pi}{4}\right)$

$2^{n / 2}\left(\cos \frac{n \pi}{3}+i \sin \frac{n \pi}{3}\right)$

$2^{n / 2}\left(\cos \frac{n \pi}{3}+i \sin \frac{n \pi}{3}\right)$

$2^{n / 2}\left(\cos \frac{n \pi}{4}+\sin \frac{n \pi}{4}\right)$