'Nother calculator problem

Discussion in 'Math' started by Mark44, Apr 28, 2008.

  1. Mark44

    Thread Starter Well-Known Member

    Nov 26, 2007
    626
    1
    Here's another one that's a little harder.

    Given an ordinary scientific calculator (defined as one where you enter the number, and then press a function button) that displays a positive number hereinafter known as x:

    Calculate the quantity \frac{x}{\sqrt{x^{2} + 1}}.

    Just to make it interesting/challenging, you can't use the digit buttons (0, 1, 2, ..., 9), the arithmetic buttons (+, -, *, /), the square root button, or the square button.
     
  2. Caveman

    Active Member

    Apr 15, 2008
    471
    0
    1. Take arctan of x
    2. Take sine of result of step 1
     
  3. Mark44

    Thread Starter Well-Known Member

    Nov 26, 2007
    626
    1
    I'm impressed!
     
  4. Caveman

    Active Member

    Apr 15, 2008
    471
    0
    Got any more? I'm bored at work at the moment.
     
  5. Mark44

    Thread Starter Well-Known Member

    Nov 26, 2007
    626
    1
    I have a couple more non-calculator problems at the moment. I'll put them in another thread.
     
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