Recent content by Sawarnik

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    MHB A mistake in the wolfram mathworld website

    No, the formula named is wrong, which is problematic. And I had already sent a message to them, but there has been no corrections! - - - Updated - - - But you can correct errors in Wiki with no prob. The MathWorld team however never listens to any suggestion and the mistake remain mistakes...
  2. S

    MHB A mistake in the wolfram mathworld website

    Seriously? Look carefully. It is Bretschneider's formula - Wikipedia, the free encyclopedia.
  3. S

    MHB A mistake in the wolfram mathworld website

    "and Brahmagupta's formula for the area of a quadrilateral:" Is the formula after that Brahmagupta's!
  4. S

    MHB How to solve this dreadful quadratic with paper and pen?

    Thanks :)
  5. S

    MHB A mistake in the wolfram mathworld website

    One that I found recently: Semiperimeter -- from Wolfram MathWorld
  6. S

    MHB How to solve this dreadful quadratic with paper and pen?

    600*sqrt{1-a^2/400}=578-a^2/2 Shorter and elegant tricks would be welcome!
  7. S

    MHB A mistake in the wolfram mathworld website

    Yeah, right. An awful lot of mistakes. I once tried that send message and sent the error and correction but no one looked at it, and remains incorrect today as well, and so I think its useless. In fact, I think Wikipedia is less error-prone than Mathworld.
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