\|\mathbfw_\perp\|^2 = \|\mathbfw\|^2 - \|\mathbfw_\parallel\|^2 = 16 - \left(\frac23\right)^2 \cdot 9 = 16 - 4 = 12. - AMAZONAWS

📅 March 6, 2026 👤 scraface

Mar 06, 2026

$\|\mathbf{w}_\perp\|^2 = \|\mathbf{w}\|^2 - \|\mathbf{w}_\parallel\|^2 = 16 - \left(\frac{2}{3}\right)^2 \cdot 9 = 16 - 4 = 12.$