@article {MATHEDUC.06060227,
author = {Simons, Stuart},
title = {Generalised trigonometry.},
year = {2012},
journal = {Mathematical Spectrum},
volume = {44},
number = {3},
issn = {0025-5653},
pages = {102-110},
publisher = {Applied Probability Trust (APT) c/o University of Sheffield, School of Mathematics and Statistics (SoMaS), Sheffield},
abstract = {Summary: A comprehensive treatment is developed of how trigonometry becomes modified when the right angle present in the basic triangle of conventional trigonometry is replaced by some other constant (but arbitrary) angle $\sigma$. The relationship between this generalised trigonometry and the conventional version is explored in some detail.},
msc2010 = {G60xx},
identifier = {2012d.00384},
}