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Math Help - Conflicting angle answers

  1. #1
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    Conflicting angle answers

    Solve for angle A,
    b=1.64
    c=3.51


    COSA=b/c
    =cos^-1(3.1/3.51)
    = 27.97 deg.

    a^2=c^2-b^2
    = 3.51^2-1.64^2
    a= 3.1

    If I take the numbers for a,b & c and make a drawing in my CAD program I get A=62 deg.
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  2. #2
    MHF Contributor
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    Quote Originally Posted by cross1933 View Post
    Solve for angle A,
    b=1.64
    c=3.51


    COSA=b/c
    =cos^-1(3.1/3.51)
    = 27.97 deg.

    a^2=c^2-b^2
    = 3.51^2-1.64^2
    a= 3.1

    If I take the numbers for a,b & c and make a drawing in my CAD program I get A=62 deg.
    Hi

    COSA=b/c
    =cos^-1(1.64/3.51)
    = 62.14 deg.
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  3. #3
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    Quote Originally Posted by running-gag View Post
    Hi

    COSA=b/c
    =cos^-1(1.64/3.51)
    = 62.14 deg.
    I must be loosing. The formula is on my page and I entered the incorrect numbers. If there was a smile for "brain dead" I would have put it in.
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