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arXiv:math/0506385 [math.CA]AbstractReferencesReviewsResources

Ramanujan's Inverse Elliptic Arc Approximation

Mark B. Villarino

Published 2005-06-20Version 1

We suggest a continued fraction origin to Ramanujan's approximation to {(a-b)/(a+b)}^2 in terms of the arc length of an ellipse with semiaxes a and b. Moreover, we discuss the asymptotic accuracy of the approximation.

Comments: Four pages
Categories: math.CA
Subjects: 41A25, 41A60
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