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Homework Help: Simultaneous Trig Equations

  1. Jun 3, 2009 #1
    1. The problem statement, all variables and given/known data
    I was working on a tension problem where a bar is supported by 2 cables at different angles.
    I found the x and y vector components, but then got stuck at the simultaneous equations part.

    2. Relevant equations
    These are the equations i ended up with.

    -T1sin(20) + T2sin(30) = 0
    T1cos(20) + T2cos(30) = 9800

    Not sure what to do, please help.
  2. jcsd
  3. Jun 3, 2009 #2
    Well it just seems like solving a simple linear system:

    T1 = T2*sin(30)/sin(20)

    Then just substitute that into the second equation and solve for T2. Then solve for T1.
  4. Jun 4, 2009 #3
    haha. Yep, thanks, i saw how simple it was too late :P
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