\Phi_B(t) = \vecB \cdot \vecA(t) = B_0 \hat{\mathbfz} \cdot \left( A_0 \cos(\omega t) \hat{\mathbfx} + A_0 \sin(\omega t) \hat{\mathbfy} \right) = 0 - AMAZONAWS 📅 March 11, 2026 👤 scraface Mar 11, 2026