A classic work of mathematics, this treatise by the French mathematician Silvestre Francois Lacroix is still widely used today as an introductory text to plane and spherical trigonometry. It also contains a valuable section on the application of algebraic principles to geometric problems, making it a versatile and useful resource for students of mathematics and physics.

This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it.

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