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In Triangle EFG find the value of f, if e=7.3cm g=8.7cm and angle E= 73 degrees

  1. Aug 14, 2011 #1
    Hi Everyone,

    I am looking for some help on this question

    In Triangle EFG find the value of f, if e=7.3cm g=8.7cm and angle E= 73 degrees

    This question is from the lesson "Cosine Law" and from what I understand you can use the cosine law if you have all three side lengths or 2 sides and the angle between the two sides...

    however, this question provides neither... how do I solve for F?
     
  2. jcsd
  3. Aug 14, 2011 #2
    Try to write out the cosine law and substitute in the values you have. You will get a quadratic which you can solve.
     
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