Imagine the conversation that came before this response? Response: Elaboration of this point and some citations on the subject follow.
CONVERSATION:Conversation:
 *what are the different modes of planar particle motion.
 *Fictitious forces do not appear in the equations of motion in an inertial frame of reference: in an inertial frame, the motion of an object is explained by the real impressed forces..
 *what happens if the particle is subjected to fictitious forces.
 *In a non-inertial frame such as a rotating frame, however, Newton's first and second laws still can be used to make accurate physical predictions provided fictitious forces are included along with the real forces..
 *how are the forces related to each other.
 *For solving problems of mechanics in non-inertial reference frames, the advice given in textbooks is to treat the fictitious forces like real forces and to pretend you are in an inertial frame..
 *what does it mean to treat the forces like real forces.
 *It should be mentioned that "treating the fictitious forces like real forces" means, in particular, that fictitious forces as seen in a particular non-inertial frame transform as "vectors" under coordinate transformations made within that frame, that is, like real forces..
 *what else should be known about the forces.
 *Next, it is observed that time varying coordinates are used in both inertial and non-inertial frames of reference, so the use of time varying coordinates should not be confounded with a change of observer, but is only a change of the observer's choice of description..
 *where are the coordinates found.
 *