High Quality Content by WIKIPEDIA articles! Divine Proportions: Rational Trigonometry to Universal Geometry is a book published in 2005, written by Norman J. Wildberger, a critic of traditional mathematics, presenting his reformulation of trigonometry. Wildberger holds a Ph.D. in mathematics from Yale University, and taught at Stanford University from 1984 to 1986 and at the University of Toronto from 1986 to 1989; he is currently an associate professor of mathematics at the University of New South Wales, Australia.