\cos 45^\circ + \cos 225^\circ = \frac{\sqrt2}2 - \frac{\sqrt2}2 = 0 - AMAZONAWS

📅 March 11, 2026 👤 scraface

Mar 11, 2026

$\cos 45^\circ + \cos 225^\circ = \frac{\sqrt{2}}{2} - \frac{\sqrt{2}}{2} = 0$