v 2.13

E (z, t) = E_{0} \sin (ω t - k z) E (z, t) = E_{0} \cos (ω t - k z)

${E(z,t)= E_0 \sin(\omega t-kz)⁡ \\ E(z,t)= E_0 \cos(\omega t-kz)}$

Error