Elements of geometry;

Mode of access: Internet.

Elements of geometry;

Mode of access: Internet.

Elements of geometry:

Mode of access: Internet.

The elements of Euclid : viz the first six books, together with the eleventh and twelfth, the errors by which Theon or others have long ago vitiated these books, are corrected, and some of Euclid's demonstrations are restored : also the book of Euclid's Data, in like manner corrected /

To this 10th ed. are also annexed, Elements of plain and spherical trigonometry.

The Elements of Euclid,

Mode of access: Internet.

Traité élémentaire de trigonométrie rectiligne et sphérique, et d'application de l'algèbre à la géométrie.

Mode of access: Internet.

Geodesics without differential equations: general relativistic calculations for introductory modern physics classes

Introductory courses covering modem physics sometimes introduce some elementary ideas from general relativity, though the idea of a geodesic is generally limited to shortest Euclidean length on a curved surface of two spatial dimensions rather than extremal aging in spacetime. It is shown that Epstein charts provide a simple geometric picture of geodesics in one space and one time dimension and that for a hypothetical uniform gravitational field, geodesics are straight lines on a planar diagram. This means that the properties of geodesics in a uniform field can be calculated with only a knowledge of elementary geometry and trigonometry, thus making the calculation of some basic results of general relativity accessible to students even in an algebra-based survey course on physics.

Един начин за преговор на формулите по тригонометрия в средното училище

Kliment Vasilev - The trigonometry formulas are given in the form of mathematical problems. Some of these problems are solved, and it is shown how the others can be solved with the help of adequate guidance that includes the previous problems. This method is suitable for revision in the secondary school, as well as for preparation for school-leaving exams and matriculation.

The Deformed Trigonometric Functions of two Variables

MSC 2010: 33B10, 33E20

Contextualização histórica para o estudo da trigonometria e construção do teodolito no ensino fundamental

Dissertação (mestrado)—Universidade de Brasília, Instituto de Ciências Exatas, Departamento de Matemática, Programa de Mestrado Profissional em Matemática em Rede Nacional, 2015.