# impedance of an sine wave circuit

I would like to get some help with the calculation and modeling of the attached circuit. this circuit is supposed to generate a 159.15 Hz sine wave(according to formula), i want to connect the output of the circuit to a transformer with minimal losses of voltage, for that i need that the output impedance of the circuit(which is also the output of the op-amp 741) would be as low as possible.

I know that ideal op-amp output impedance is 0, but how do i calculate the actual impedance of the circuit(Rout) ? and how to i model the opamp in the circuit ?

if i suppose to model the opamp according to the pic below how do i calculate the inputs?(v±)

when solving these circuits i usually start with KCL from a voltage source summing up all elements until i get to ground but how do start the calculation if it is a feedback circuit like this.

frequency formula: 1/2*pi*R1*R2*C1*C2 while C1=C2=0.1*10^6 [F], R1=1K[ohm],R2=100K[Ohm]

the impedance of C1 and C2 is 1000 [Ohm],