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Homework Help: Simultaneous Equations

  1. Dec 4, 2012 #1
    1. The problem statement, all variables and given/known data

    I have two eqs. but am stuck on solving them.

    2. Relevant equations

    FA - 10sinθ = 0
    NA - 10cosθ = 0
    Where FA = 0.15NA

    3. The attempt at a solution

    I've substituted the 0.15NA into the first equation but am still not sure how to get θ? I'm sure its something easy that I'm just drawing a blank on.
  2. jcsd
  3. Dec 4, 2012 #2


    User Avatar

    Staff: Mentor

    Solve the second equation for NA, substitute into first equation (where you've already replaced FA with 0.15NA). Should boil down to a simple trig expression.
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