New posts in Roots Of Unity

Showing that $\mathbb{Q}(\zeta_p, \sqrt[p]{\ell}) = \mathbb{Q}(\zeta_p + \sqrt[p]{\ell})$ for $p,\ell$ primes.

Intuitive understanding of why the sum of nth roots of unity is $0$

Prove that $\prod_{k=1}^{n-1}\sin\frac{k \pi}{n} = \frac{n}{2^{n-1}}$

Power sums of p-th roots of unity

An algebraic number is not a root of unity?

How small can a sum of a few roots of unity be?