 Divine Proportions: Rational Trigonometry to Universal Geometry

"Divine Proportions: Rational Trigonometry to Universal Geometry" is a book authored by Norman J. Wildberger, which presents an alternative approach to traditional trigonometry and geometry. In this work, Wildberger critiques the conventional methods used in these fields and introduces the concept of "Rational Trigonometry." The main premise of Rational Trigonometry is to replace the traditional sine, cosine, and tangent functions with more straightforward geometric concepts based on rational numbers.