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Math Help - law of sines

  1. #1
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    law of sines

    okay i am usually pretty good with the Law of Sine
    but this problem I am having trouble with.
    I dont think it can b solved. can it?

    problem:
    Solve the triangle in which gamma=sin50degrees and a=2 and c= 1

    i know it is a SAS triangle.
    set up

    (sin50degrees/1)=(sin(alpha)/2)
    cross multiply
    2(sin 50degrees)=1(sin(alpha))
    (1.532088886/1)=sin(alpha)
    sin^-1(1.532088886/1)=alpha

    is that way off?
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  2. #2
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    Quote Originally Posted by lsnyder View Post
    okay i am usually pretty good with the Law of Sine
    but this problem I am having trouble with.
    I dont think it can b solved. can it?

    problem:
    Solve the triangle in which gamma=sin50degrees and a=2 and c= 1

    i know it is a SAS triangle.
    set up

    (sin50degrees/1)=(sin(alpha)/2)
    cross multiply
    2(sin 50degrees)=1(sin(alpha))
    (1.532088886/1)=sin(alpha)
    sin^-1(1.532088886/1)=alpha

    is that way off?
    Let's put it in terms we call all understand first.

    If you have a triangle with sides a, b, c then the angle opposite each side is A, B, C.

    Which one is \gamma?

    Also, what are we trying to find? All the sides? All the angles? The area? The perimeter?
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