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Math Help - Need Help with Yr 10 Trigonometry

  1. #1
    Newbie
    Joined
    May 2008
    Posts
    6

    Need Help with Yr 10 Trigonometry

    My year 10 daughter is having difficulty with triangles. She has worked out the side(mm), angle (degrees) and Sine of Angle, but can't work out the Ratio (side length/sine of angle).
    Here are the three problems. We would really appreciate any help with this:

    Problem 1
    side: 80mm
    Angle : 47 degrees
    Sin A = 0.73
    Ratio...?????

    Problem 2
    side: 50mm
    Angle : 27 degrees
    Sin B = 0.45
    Ratio...???

    Problem 3
    side : 105mm
    Angle = 106 degrees
    Sin C = 0.96
    Ratio...???
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  2. #2
    MHF Contributor
    Joined
    Apr 2005
    Posts
    1,631
    Quote Originally Posted by jennybianca View Post
    My year 10 daughter is having difficulty with triangles. She has worked out the side(mm), angle (degrees) and Sine of Angle, but can't work out the Ratio (side length/sine of angle).
    Here are the three problems. We would really appreciate any help with this:

    Problem 1
    side: 80mm
    Angle : 47 degrees
    Sin A = 0.73
    Ratio...?????

    Problem 2
    side: 50mm
    Angle : 27 degrees
    Sin B = 0.45
    Ratio...???

    Problem 3
    side : 105mm
    Angle = 106 degrees
    Sin C = 0.96
    Ratio...???
    It is all in there, Ma'am.

    If ratio = (side length) / (sine of angle), then,

    for Problem 1,
    ratio = 80 / 0.73 = 109.59 mm

    Same way on the other problems.
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  3. #3
    Newbie
    Joined
    May 2008
    Posts
    6

    relating to triganometry question

    Thank you very much for your help.
    My daughter said there is another question that says:
    "Comment about the results in the last column?"

    Would you know what that means?
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