E = m c 2 {\displaystyle E=mc^{2}}
sin θ = 1 2 π {\displaystyle \sin \theta ={1 \over 2}\pi }
sin θ = B {\displaystyle \sin \theta =\mathbf {B} }
B = sin θ {\displaystyle \mathbf {B} =\sin \theta }
