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Math Help - Help with transpostion of equation, please?

  1. #1
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    Exclamation Help with transpostion of equation, please?

    Hello everyone, this is my first post, so please have mercy

    I've been trying to figure out how to transpose the following equations so that the value in square brackets, [ ] , is the subject. *sorry about not knowing how to insert a square root*

    Eqn 2: A = 1 / sqr root(w^2 . R^2 . C^2 + 1) ............ [R . C]

    I hope that was clear enough. This is needed for an assignment I have to email before 5pm (current time: 2pm!!) so any assistance in showing me the steps as to how to transpose these would be greatly appreciated!!

    Thank you
    Last edited by conpanbear; September 21st 2008 at 09:15 PM. Reason: Eqn 1 removed, because I think I can go on without transposing that one.
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  2. #2
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    Hello,

    A^2(w^2R^2C^2+1)=1 becomes A^2w^2R^2C^2=1-A^2.

    I hope it helps.
    Bye.
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  3. #3
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    Thanks for the reply, wisterville. I think I have some idea of how to approach it now
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  4. #4
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    Can I say that
    R^2C^2 = (1-A^2)/(A^2w^2)
    can be
    RC = sqr root((1-A^2)/(A^2w^2))?
    I don't think I can, but I can't figure out how to specifically get RC on its own.
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  5. #5
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    Hello,

    \sqrt{x}=a\iff\begin{cases}x=a^2\\a\geq 0\end{cases}.

    Of course, even when you have a^2=x, you have to check a>=0 to get a=sqrt x. But for most "problems about transposition of equations", these details are neglected by the composers...

    Bye.
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