List questions from cyclotomic-polynomials

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Primes splitting in cyclotomic extension of quadratic field

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Evaluate $\prod_{k=1}^{n-1} \cos \frac{k \pi}{n}$ where $\text{gcd}(n,k)=1$ and $n$ is odd

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Method for finding minimal polynomial of primitive root of 1 over $\mathbb Q$

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Solving for integers $x$ such that $p$ divides $\Phi_n(x)$

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Finding the splitting field of $\Phi_{21}(x)$ over $\mathbb Q$

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Can we learn things about coefficients of cyclotomic polynomials from Sylow Theory?

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Determining minimal polynomials of roots of unity

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Eigenvalues are roots of cyclotomic polynomial

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Are the class numbers for the field $\Bbb{Q}(e^{\pi i/n})$ $1$ for all prime $n$?

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How many subfields of $\mathbb Q(\zeta_{16})$ for which $[L:\mathbb Q]=2$?

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Prove for $n \in \mathbb N$ and prime $p\mid n$, $\Phi_{np}(t) = \Phi_n(t^p)$

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Coefficients of $pq$-th cyclotomic polynomial for distinct primes $pq$

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Several identities regarding cyclotomic polynomials.

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Using Gauss Lemma to reason about closure properties of $\mathbb Z[X]$.

Primes splitting in cyclotomic extension of quadratic field

Evaluate $\prod_{k=1}^{n-1} \cos \frac{k \pi}{n}$ where $\text{gcd}(n,k)=1$ and $n$ is odd

Method for finding minimal polynomial of primitive root of 1 over $\mathbb Q$

Solving for integers $x$ such that $p$ divides $\Phi_n(x)$

Finding the splitting field of $\Phi_{21}(x)$ over $\mathbb Q$

Determining subfields of cyclotomic field extension

Can we learn things about coefficients of cyclotomic polynomials from Sylow Theory?

Determining minimal polynomials of roots of unity

Eigenvalues are roots of cyclotomic polynomial

Are the class numbers for the field $\Bbb{Q}(e^{\pi i/n})$ $1$ for all prime $n$?

How many subfields of $\mathbb Q(\zeta_{16})$ for which $[L:\mathbb Q]=2$?

Prove for $n \in \mathbb N$ and prime $p\mid n$, $\Phi_{np}(t) = \Phi_n(t^p)$

Coefficients of $pq$-th cyclotomic polynomial for distinct primes $pq$

Several identities regarding cyclotomic polynomials.

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