\cos\left( \theta - \left(\theta + \frac2\pi7 \right) \right) = \cos\left( -\frac2\pi7 \right) = \cos\left( \frac2\pi7 \right). - AMAZONAWS

📅 March 11, 2026 👤 scraface

Mar 11, 2026

$\cos\left( \theta - \left(\theta + \frac{2\pi}{7} \right) \right) = \cos\left( -\frac{2\pi}{7} \right) = \cos\left( \frac{2\pi}{7} \right).$