Talk:Brahmagupta interpolation formula

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[edit] cleanup

The article says:

The Brahmagupta interpolation formula is:
r \sin\theta = \frac{\triangle\theta}{h} \left[\left(\frac{D_{p+1} + D_p}{2}\right) + \frac{\triangle\theta}{h}\left(\frac{D_{p+1} - D_p}{2}\right)\right].

θ is self-explanatory, but what is Dp and what is h? Obviously the article needs to say what those are. And how is the quantity called r on the left side related to anything on the right side? It seems as if you'd have to be so confused in order to leave out things like that that it's hard to imagine how you could be able to write the formula at all. I don't know if I'll ever understand this kind of behavior. Michael Hardy 21:48, 1 June 2007 (UTC)

Certainly this edit helps clarify things, but it would seem that the question about r remains. Michael Hardy (talk) 17:25, 7 May 2008 (UTC)