Proper distance from the FRW metric

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1. Nov 16, 2015

Plaetean

1. The problem statement, all variables and given/known data
Question:

2. Relevant equations

Dp=R(t)Dc where R(t) is the scale factor, Dc is the comoving distance

3. The attempt at a solution

I must have tried solving this starting 10 different ways now, starting with the fact that distance=integral over velocity dt, trying to integrate the metric itself with dphi=dtheta=0 and I just can't get anywhere at all.

2. Nov 21, 2015