Equation Icon  out in ω0ΔL-- in ω0ΔL-- in inω0-ΔL- lc (t) ≃ lc Δ 𝜖cos c − ls sin c ≃ lc Δ 𝜖 − ls c , (43 ) ω ΔL ω ΔL ω ΔL loust(t) ≃ licnsin -0----+ lins Δ 𝜖 cos-0--- ≃ linc -0----+ lins Δ 𝜖, (44 ) c c c