Choose an angle or point from the preimage and name its image
![Choose an angle or point from the preimage and name its image class=](https://us-static.z-dn.net/files/d29/65b2640e8530099e01195d8df3ab67c4.png)
From the preimage, the angle or point I choose is P and I name its image as: P maps to P’.
The set of all elements of the domain that map to the members of S is the inverse image or preimage of a particular subset S of the codomain of a function.