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This is the projection on the x axis of a 2-bar linkage. I need to find the PDF of the end of the second link (point B)

1. Link C of length rC is pinned at the origin and its other end is pinned to link B at point C. Its length projected on the x axis is nomally distributed with mean μC=0 and std dev σC = 0.000375.

2. Link B of length r.B is pinned at point C on link C and its other end is point B. Its length projected on the x axis is nomally distributed with mean μB= xC (I think) and std dev σB = 0.00125.

I need to find the PDF for point B as a function of x.