S = 2i \cdot rac{e^{i( heta - \phi)/2} + e^{-i( heta - \phi)/2}}{e^{i( heta - \phi)/2} - e^{-i( heta - \phi)/2}} = 2i \cdot rac{2\cos\left(rac{ heta - \phi}{2}

Sat, 02 May 2026 10:54:33 +0000

Content under review