Final answer:
Without additional context or a diagram, it is not possible to determine the length of segment OP based on the given angles and segment RM length alone.
Step-by-step explanation:
To find OP, we need additional information about the diagram or the context in which angles P and S, and segment RM are related. It seems like this could be a question that involves a circle (where OP would be the radius), triangles, or some other geometric figures. Since we are not given a specific diagram or additional context, we cannot accurately determine the length of OP without more information. If OP is supposed to be a segment in a geometric figure related to RM, angles P and S, the question may be referring to a circle or triangle situation, but we need the relationship between these elements to provide a precise answer.