A Complete Treatise On Practical Mathematics : Kessinger Publishing : 9781164521501 : 1164521500 : 10 Sep 2010 : A Complete Treatise On Practical Mathematics: Including The Nature And Use Of Mathematical Instruments (1792) by John Macgregor is a comprehensive guide to the practical applications of mathematics. The book covers a wide range of topics, including arithmetic, algebra, geometry, trigonometry, and calculus. It also includes a detailed discussion of the nature and use of mathematical instruments, such as the compass, protractor, and slide rule.The book is organized into several sections, each of which focuses on a different area of mathematics. The first section covers arithmetic, including addition, subtraction, multiplication, and division. The second section covers algebra, including equations, inequalities, and polynomials. The third section covers geometry, including lines, angles, triangles, and circles. The fourth section covers trigonometry, including sine, cosine, and