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Math Help - Find Remaining Angles and Sides

  1. #1
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    Find Remaining Angles and Sides

    Find remaining angles and side if they exist. If no triangle exists, say "No triangle"

    a=4 a=1 y=100 degrees

    (the problem does not state where angle y lies) please solve and explain process I am doing a similar problem but found this one in the book.
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    Re: Find Remaining Angles and Sides

    What is a?
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  3. #3
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    Re: Find Remaining Angles and Sides

    Quote Originally Posted by Shakarri View Post
    What is a?
    I love your signature btw Shakarri
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    Re: Find Remaining Angles and Sides

    Quote Originally Posted by Shakarri View Post
    What is a?
    Oh that was totally my fault it is a=4 b=1 and y=100 degrees
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  5. #5
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    Re: Find Remaining Angles and Sides

    If y is the angle between sides a and b then you can find the third side by using the "cosine law":
    c^2= 4^2+ 1^2- 2(4)(1)cos(100)

    You can then find the angle opposite, say, a, using the "sine law":
    \frac{sin(a)}{4}= \frac{sin(100)}{c}.

    If angle y is NOT between the two sides, then there is no such triangle.
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