Norman Wildberger launched his book, Divine Proportions: Rational Trigonometry to Universal Geometry, at UNSW on Sept 20, 2005.

Book content:
This text introduces a new and simplified approach to trigonometry and a major restructuring of Euclidean geometry. It replaces cos, sin, tan and all those other transcendental trig functions with rational functions and elementary arithmetic. It develops a complete theory of planar Euclidean geometry over a general field without any reliance on `axioms'. And it shows how to apply this new theory to a wide range of practical problems from engineering, physics, surveying and calculus.
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