A clear, readable history of how trigonometry grew from practical tables to modern theory. This work traces the invention and spread of the logarithms, showing how practical needs in trigonometric calculation sparked major shifts in methods and tools. It highlights two pivotal figures, Jobst Bürgi and John Neper, and explains why their ideas reshaped computation across Europe, the Netherlands, Germany, France, Italy, and Sweden. The book also surveys later developments in the 18th and 19th centuries, including the rise of new forms of trigonometrie and the broader teaching of the subject. - Learn how log tables and alternative calculation methods changed everyday computations - See how Bürgi and Neper each contributed to the birth of the logarithms - Discover the expansion of trigonometrie through the 18th and 19th centuries - Get a sense of how the history connects to geometry, geodesy, and teaching Ideal for readers of the history of mathematics and the science of measurement.