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

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

Algebra and trigonometry with analytic geometry : Swokowski, Earl William, 1926- : Free Download, Borrow, and Streaming : Internet Archive

Trigonometry : Ted Sundstrom : Free Download, Borrow, and Streaming : Internet Archive

Algebra And Trigonometry : Bettinger,Alvin K. : Free Download, Borrow, and Streaming : Internet Archive

The volume of the International Library of Technology are made up of Instruction Papers, or Sections, comprising the various courses of instruction

Geometry and Trigonometry: Geometry, Plane Trigonometry, Natural Trigonometric Functions, Logarithmic Trigonometric Functions

The elements of mechanical engineering : International Correspondence Schools : Free Download, Borrow, and Streaming : Internet Archive

Rethinking Mathematics, PDF, Curriculum

History of geodesy - Wikipedia

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

A textbook on civil engineering : International Correspondence Schools : Free Download, Borrow, and Streaming : Internet Archive

Geometry : Euclid and beyond : Hartshorne, Robin, author : Free Download, Borrow, and Streaming : Internet Archive

Free Trigonometry Tutorial - Introduction to Trigonometry (Algebra 2 Unit 14)