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Math Help - Law of Sine

  1. #1
    Newbie
    Joined
    Nov 2005
    Posts
    2

    Law of Sine

    Hi again, Well I have a problem doing the law of sine. Here is the question

    1) Suppose you are given a triangle where:
    A= 0.5 B= 1 and c= 6

    Then
    C= 1.641592
    a=_____
    b=_____
    Note: In this problem angles are measured in radians.


    How I already found that C is 1.641592 By Pi-A-B = 1.641592. This is where I get confused at.

    I use the law of sine

    ___a___ = ___6__ * sin(0.5)
    sin(0.5) sin(1.641595)


    a = ______6*sin(0.5)______ = .052359213
    sin(1.641592)

    a = 6*sin(0.5) / sin(1.641592)

    a = 1.82772114

    Well I know thats the wrong answer but what am I doing wrong?
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  2. #2
    MHF Contributor
    Joined
    Apr 2005
    Posts
    1,631
    " Note: In this problem angles are measured in radians. "

    Really?
    Did you follow that?
    Then why did you use degrees in your computations?
    If you use radians, you will get a = 2.883777.
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  3. #3
    Newbie
    Joined
    Nov 2005
    Posts
    2
    oh... my mistake! I must have switch it back to degree when I was doing other problem. and I didn't realized it.

    Thank you
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