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SohCahToa couldn't figure it out without the angle θ

  1. Oct 29, 2012 #1
    1. The problem statement, all variables and given/known data
    c332480330de2a5af92e8c7dc5df8d2f.png


    2. Relevant equations
    Sin θ = Opp/Hyp
    Cos θ = Adj/Hyp


    3. The attempt at a solution
    I tried to reverse it, but I couldn't figure it out without the angle θ
     
    Last edited by a moderator: Feb 6, 2013
  2. jcsd
  3. Oct 29, 2012 #2
    Re: SohCahToa

    What about the Pythagorean Theorem?
     
  4. Oct 29, 2012 #3
    Re: SohCahToa

    I need help solving....
     
  5. Oct 29, 2012 #4
    Re: SohCahToa

    What is the Pythagorean Theorem?
     
  6. Oct 29, 2012 #5
    Re: SohCahToa

    What frogjg said. The Pythagorean Theorem says that when you have a right angled triangle like the one in your picture. The length of the longest side squared is equaled to the sum of the squares of the shorter sides.

    Mathematically, (if "a" is the hypotenuse and "b" and c" are the shorter sides)

    a2 = b2 + c2

    Should be pretty straight forward from here on.

    First figure out what is your "a" ,"b" and c".

    If you don't understand the theorem, this video might be useful: http://www.khanacademy.org/math/algebra/ck12-algebra-1/v/pythagorean-theorem
     
    Last edited: Oct 29, 2012
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