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Math Help - Please Check my Problem did I do it right! (Must see)

  1. #1
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    Please Check my Problem did I do it right! (Must see)

    So it ask to evaluate tan(A-B)

    Given:
    TanA: -4/3
    TAnB: -√8 (negative radical8)

    So far I got

    Tan A = Tan A - Tan B / 1+ tan A Tan B

    Tan A= -4/3-(-√8/1) divided 1+(-4/3)(-√8/1)
    Tan A= -4+3√8/3 divided by 3+4√8/3

    So now I dived both -4+3√8/3 * 3/3+4√8
    = -4+3√3/3-4√8

    As my final answers
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  2. #2
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    Re: Please Check my Problem did I do it right! (Must see)

    Quote Originally Posted by TrimHonduras View Post
    So it ask to evaluate tan(A-B)

    Given:
    TanA: -4/3
    TAnB: -√8 (negative radical8)

    So far I got

    Tan (A - B) = ( Tan A - Tan B ) / ( 1+ tan A Tan B )

    Tan ( A - B )= [ -4/3-(-√8/1) ] / [ 1+(-4/3)(-√8/1) ]
    Tan ( A - B )= [ (-4+3√8)/3 ] / [ (3+4√8)/3]

    So now I dived both [(-4+3√8)/3] * [3/(3+4√8)]
    = (-4+3√3)/(3-4√8)

    As my final answers
    Before I go any further, read where I have put in the necessary brackets, so that what you have written makes sense. Brackets are not optional and without them what you have written is garbage.
    Thanks from TrimHonduras, topsquark and Paze
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  3. #3
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    Re: Please Check my Problem did I do it right! (Must see)

    thanks yours looks pretty neat... with brackets.. and yeah mines looks crappy.... hey thanks!
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