RC Op Amp phase shifter transfer function/how to get

[wig44]

Hello,

I am trying to figure out the transfer function for an RC phase shifter:
http://imgur.com/2dnRYn7 (Picture of circuit)

I am not sure how to calculate the output and specifically the phase of the output of this circuit. I understand that I need to consider one of the 'golden rules' of ideal op amps that v+ = v- but I'm unsure of how to consider the voltage going into v+. My knowledge in this area is pretty shaky!

I understand that I cannot just be supplied with the output/phase equation of this circuit and don't want it, but would like some help figuring it out! Can anyone help push me in the right direction?

Thanks for reading.

 

[Jony130]

Simply treat RC as a voltage divider.
v+ = Vin * Xc/(R + Xc) or Vin = (1/s*C)//(1/s*C + R)