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Trig question eq in the form y = sin k x

  1. Oct 28, 2009 #1
    1. The problem statement, all variables and given/known data

    http://img62.imageshack.us/img62/7677/30639229.jpg [Broken]

    2. Relevant equations

    y = sin k x



    3. The attempt at a solution

    Looking for help with part 12b in particular so i can try 13c

    Im not quite sure how the coefficent of x (K) in the function y=sin kx relate to peroid and frequency. I know that if k is less then 1 the graph is stretched horizontally and if k > 1 its compressed horizontally but i cant come up with the equation.
     
    Last edited by a moderator: May 4, 2017
  2. jcsd
  3. Oct 28, 2009 #2

    rock.freak667

    User Avatar
    Homework Helper

    Periodic functions follow the form

    y=Acos(ωt)

    OR

    y=Asin(ωt)


    ω is the angular frequency. (In your question, A=1)
     
  4. Oct 28, 2009 #3
    i got it the formula i could not recall was that period = 2Pi / K (constant in my question)
    thanks for your help sir!
     
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