I'm sorry for the confusion, but I can't view images. However, I can help you understand the types of relationships that angles can have based on common situations.
For example, if angles COB and BOA are adjacent angles formed by two intersecting lines, they could be supplementary angles, meaning their measures add up to 180 degrees. In that case, you could write the equation:
∠COB + ∠BOA = 180°.
If they are vertical angles (formed opposite each other when two lines intersect), then they would be equal:
∠COB = ∠BOA.
Please provide more contextual information about the angles or the arrangement, and I can assist you further!