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Homework Help: Finding a limit, with trig

  1. Sep 30, 2008 #1
    1. The problem statement, all variables and given/known data
    Find the limit or prove it does not exist.

    lim as s->0 (sin2s)^4/s^4

    2. Relevant equations
    i know i have to use sinx/x = 1 but im having trouble manipulating the function into that form

    3. The attempt at a solution

    my first thought was that i could just take the 2 out as a constant would that just be (2^4)(sinx)^4/x^4

    but then i have (sinx)^4 not sinX^4 im stuck on what king of algebra will work here
  2. jcsd
  3. Sep 30, 2008 #2
  4. Sep 30, 2008 #3
    Lim_(x->0) of sin(ax)/(ax)=1
  5. Sep 30, 2008 #4
    ahh so then (2*1)^4 = 16

    thanks alot
  6. Sep 30, 2008 #5
    good, welcome!
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