MathDB

12

Part of PEN G Problems

Problems(1)

G 12

Source:

5/25/2007
An integer-sided triangle has angles pθ p\theta and qθ q\theta, where p p and q q are relatively prime integers. Prove that cos⁡θ \cos\theta is irrational.
trigonometrynumber theoryrelatively primeIrrational numbers