is. becomes, or takes place, or results. Same as "arose" in Luke 15:14.
in the presence of. before. It does not say that the angels rejoice; but it is the divine joy in their presence.
God. App-98.
Related Commentaries of Luke 15:10
Luke 15:10
10 Likewise, I say unto you, there is joy in the presence of the angels of God over one sinner that repenteth.