Geometry and trigonometry : International Correspondence Schools : Free Download, Borrow, and Streaming : Internet Archive

Geometry -- Plane trigonometry -- Natural trigonometric functions -- Logarithmic trigonometric functions

Elements of geometry and trigonometry : Legendre, A. M. (Adrien Marie), 1752-1833 : Free Download, Borrow, and Streaming : Internet Archive

Geometry and trigonometry : International Correspondence Schools : Free Download, Borrow, and Streaming : Internet Archive

A school geometry. containing the substance of Euclid books II anfd III and part of book IV : Hall, H. S. (Henry Sinclair), 1848-1934 : Free Download, Borrow, and Streaming : Internet Archive

A school geometry. containing the substance of Euclid books II anfd III and part of book IV : Hall, H. S. (Henry Sinclair), 1848-1934 : Free Download, Borrow, and Streaming : Internet Archive

College geometry : an introduction to the modern geometry of the triangle and the circle : New York : Barnes & Noble : Free Download, Borrow, and Streaming : Internet Archive

I want to understand the core of the math. Where does it start and the why behind everything we studied? Are there any books or sources recommendation? - Quora

Introductory trigonometry : a triangular approach with applications : Rudolph, Gordon B., 1954- : Free Download, Borrow, and Streaming : Internet Archive

Full article: The power of place: spatializing critical mathematics education

Complete school algebra : Hawkes, Herbert E. (Herbert Edwin), 1872-1943 : Free Download, Borrow, and Streaming : Internet Archive

Geometry and trigonometry : International Correspondence Schools : Free Download, Borrow, and Streaming : Internet Archive

Elements of geometry, conic sections, and plane trigonometry : Elias Loomis : Free Download, Borrow, and Streaming : Internet Archive

History of geodesy - Wikipedia