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Application of calculus

  1. Jan 25, 2012 #1
    1. The problem statement, all variables and given/known data

    A generated AC voltage has a value given by V = 4cos2θ.

    You will need to use the identity cos^2⁡θ = 1/2(1+cos2θ)



    2. Relevant equations

    a) Find the mean value of the voltage over a full cycle (0 ≤ θ ≤ 2π) using integral calculus

    b) Find the r.m.s. value of the voltage over a full cycle (0 ≤ θ ≤ 2π) using integral calculus


    3. The attempt at a solution

    How should I be able to solve problems like this?

    Thanx
     
  2. jcsd
  3. Jan 25, 2012 #2

    LCKurtz

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    Use the formulas for mean and rms and do the integrals. Show us what you get.
     
  4. Jan 25, 2012 #3
    I know the two formulas but please explain to me what to do with it. I am lost.

    Give me somewhere to start please.
     
  5. Jan 25, 2012 #4

    LCKurtz

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    You start with the formulas. If you know the formulas, they are nothing more than integrals. Do you know how to evaluate integrals?

    I don't know how to help you until you show me what formulas you are trying and where you are stuck.
     
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