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Homework Help: Solving 2 unknown variables with 2 equations

  1. Sep 2, 2010 #1
    1. The problem statement, all variables and given/known data
    Find F and [tex]\theta[/tex]

    2. Relevant equations
    Fcos[tex]\theta[/tex] = 250
    Fsin[tex]\theta[/tex] = 420

    3. The attempt at a solution

    I can't remember how to solve 2 equations with 2 unknowns and trig functions... How do I start?
  2. jcsd
  3. Sep 2, 2010 #2
    What trigonometric identities do you know that connect the sine and cosine functions?
  4. Sep 2, 2010 #3
    sin2([tex]\theta[/tex]) + cos2([tex]\theta[/tex]) = 1
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