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Math Help - using trigonometry to find length

  1. #1
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    using trigonometry to find length

    Hello All.

    Here is the problem: You have a triange (no right angle anywhere in sight) They (my math teacher) gives you the angle 76 degrees. They give you an angle with 53 degrees. They give you side "w", which is opposite the angle 76. Finally they give you a side length of 25.

    Find W.

    To find W I thought I would have to either use the law of Cos or the law of Sin.

    Which one!?

    thanks!
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  2. #2
    Junior Member Morphayne's Avatar
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    Use the sine law.
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  3. #3
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    my final answer was 97 degrees.

    sin(x)/37 = sin(50)/29

    29 sin(x) = 28.34

    divide by 29

    you get roughly 97 degrees
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  4. #4
    Junior Member Morphayne's Avatar
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    Quote Originally Posted by zachcumer View Post
    my final answer was 97 degrees.

    sin(x)/37 = sin(50)/29

    29 sin(x) = 28.34

    divide by 29

    you get roughly 97 degrees
    Weren't you looking for side w?

    a/sinA = b/sinB

    w/sin76 = 25/sin53

    w = 25 sin76/sin53

    w = 30.4
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  5. #5
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    sorry I was looking at the wrong question...yeah your right!
    thanks
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