A rational sine and cosine of the angles of a triangle

The article deals with triangles whose sines and cosines of the angles are the rational numbers. We prove that these triangles are similar to Pythagorean or Heronian triangles, and vice versa.

Bibliographic Details
Published in:Lietuvos Matematikos Rinkinys
Main Authors: Edmundas Mazėtis, Grigorijus Melničenko
Format: Article
Language:English
Published: Vilnius University Press 2013-12-01
Subjects:
Pythagorean triangles
Heronian triangles
Pythagorean angles
sines
cosines
Online Access:https://www.journals.vu.lt/LMR/article/view/17182

Internet

https://www.journals.vu.lt/LMR/article/view/17182

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