Note on a Formula in Solid Geometry

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Authors

DOI:

https://doi.org/10.18311/jims/1924/17657

Abstract

In the issue of the Journal for February last, Mr. Gulasekharam gave under this title a neat solution of the problem of calculating the angles between the lines in which a cone is cut by a plane through its vertex. The following method of dealing with the same problem is neither original nor new; I myself had it from Dr. Bromwich several years ago, and there is an echo of it in § 7°34 of my Multilinear Functions of Direction.