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Math Help - Algebra

  1. #1
    Junior Member
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    Unhappy Algebra

    Given: x+y-z=xyz
    Find the value of
    \frac{2x}{1-x^2}+\frac{2y}{1-y^2}+\frac{\sqrt z}{1-y^2}
    2x/(1-x^2)+2y(1-y^2)+(z)^1/2 /(1-y^2)
    Please show all the steps involved.
    Last edited by CaptainBlack; August 30th 2009 at 02:39 PM.
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  2. #2
    MHF Contributor
    skeeter's Avatar
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    Quote Originally Posted by matsci0000 View Post
    Given: x+y-z=xyz
    Find the value of
    \frac{2x}{1-x^2}+\frac{2y}{1-y^2}+\frac{\sqrt{z}}{1-y^2}
    latex fix
    ...
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  3. #3
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    Lightbulb Can this question be solved by Trigonometry

    Let x=tan A
    y=tan B
    z=tan C

    Before I proceed , can anyone tell whether the following equality is true or not?
    tan A+ tan B -tan C= tan A tan B tan C
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  4. #4
    Member rtblue's Avatar
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    Birmingham, Alabama.
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    wrong forum -.- post your question in the algebra forum..
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