Calculating Vac in a Half Wave Rectifier Circuit with Capacitor

[kstopp]

Homework Statement

Using the approximate triangular output shown and Vdc previously calculated, use the expression Vout=Vdc + Vac to solve for Vac. Find an expression for Vac that is valid from t=0 to t=T. Your expression should be in terms of Vp,R,C,T and t.

The circuit is a half wave rectifier with a capacitor.

Eventually I am trying to calculate ripple factor but I need the Vac to calculate Vrms and then onto calculating ripple = Vac rms / Vdc

Homework Equations

Vdc= Vp - VpT/2RC where Vp= voltage at peak

Vout=Vdc + Vac

The Attempt at a Solution

I am not sure what I am supposed to be using for V out. I was given Vin=Vocosωt where T=2∏/ω is the period of the input signal.

Am I supposed to use Vpcosωt for my Vout?

 

[kstopp]

I figured it out, I had to assume that I was looking at a straight line between t=0 and t=T. Then formulate a y=mx+b for the line. That was my Vout I was looking for.