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  Discussion about math, puzzles, games and fun.   Useful symbols: √ ∞ ≠ ≤ ≥ ≈ ⇒ ∈ Δ θ ∴ ∑ ∫ π -

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#1 2012-11-26 01:51:14

pokrate
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What is dx.dx ?

I always wondered about dx.dx ? How to handle that ? If I consider a small triangle with height = dy, and width dx, then
hypotenuse dh = sqrt(dy^2 + dx^2). Now suppose I want to differentiate this equation wrt time t, what we will get  ?

#3 2012-11-26 04:41:32

pokrate
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Re: What is dx.dx ?

Thanks for the reply. Hopefully I will make some big leap forward with this thing.

#4 2012-11-26 04:46:21

scientia
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Re: What is dx.dx ?

Correction:



Take the positive square root if h is increasing with respect to t, the negative square root if decreasing.

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