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Problem

a position vector of point (1), identified by sherical coordinates, is 5m away from point (2).

I have a unit vector R1,2 identified by spherical coordinates [Aex - Bey +Cez], giving the direction to point 2.

How do I find the position vector of point 2

Do I just add 5.0m to each element? Of course not, but how do I do it, please?