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What is the sine of i (initial value prob)

  1. Feb 10, 2012 #1
    what is the sine of "i" (initial value prob)

    1. The problem statement, all variables and given/known data
    What is the sine or cosine of i?
    does it make sense to ask what sine of root (-1) is?

    im asking because its from 2nd order DE: t^2y'' - ty' + y = 0.......y(1) = 1 y'(1) = 1


    when i rearrranged and determined omega it ended up being i.. is that wrong??

    (omega squared = -(1/t) so omega = i)

    ?

    please help...thanks



    2. Relevant equations



    3. The attempt at a solution
    1. The problem statement, all variables and given/known data



    2. Relevant equations



    3. The attempt at a solution
     
  2. jcsd
  3. Feb 10, 2012 #2

    tiny-tim

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    sinx = (eix - e-ix)/2

    so sini = … ?
     
  4. Feb 10, 2012 #3

    LCKurtz

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    Re: what is the sine of "i" (initial value prob)

    You didn't show any work and I don't know what ω is that you are talking about nor what the sine or cosine functions have to do with this problem, let alone the sine of i.
     
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