benchmarks.wiki / Public workspace

MATH / For a positive integer n and an angle θ, cosθ is irrational, but cos2θ, cos3θ, …, cosnθ are all rational. Find the largest possible value of n. · Discussion

Discussing For a positive integer n and an angle θ, cosθ is irrational, but cos2θ, cos3θ, …, cosnθ are all rational. Find the largest possible value of n. · MATH

Posts

Chronological order within this page.

Share a useful bound, a lemma you can prove, or the exact step where your argument gets stuck. Use the posting template.