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Homework Help: Isolating a variable in an equation

  1. Apr 10, 2010 #1
    1. The problem statement, all variables and given/known data

    given the equation:

    (k1)(L^2)sin(theta)cos(theta)+(k2)(L^2)sin(theta)-(k1)(L^2)sin(theta)cos(theta)-.5(m)(g)(L)cos(theta) = 0

    find theta in terms of k1,k2,L,m,g

    I've been messing around with trig identities all day. I would really appreciate some help.
  2. jcsd
  3. Apr 10, 2010 #2


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    At the risk of pointing out the obvious, don't the first and third terms cancel?
  4. Apr 10, 2010 #3
    my bad, I had 2 typos in the equation. my notes has become such a mess, I can't even keep things straight on this problem anymore. here's the correct version:

    (k2)(L^2)sin(theta)cos(theta)+(k1)(L^2)sin(theta)-(k1)(L^2)sin(theta)cos(theta)-.5(m)(g)(L)cos(theta) = 0

    find theta in terms of k1,k2,L,m,g
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