(1) Easy Exercises in Algebra for Beginners (2) Plane Geometry for Secondary Schools (3) Cartesian Plane Geometry Part i (4) A Sequel to Elementary Geometry (5)Text-book of Mechanics Vol ii (6 ...

Two US college students, who discovered a new way to prove Pythagoras' famous 2,000-year-old theorem in 2022 have now come up with five different ways of solving the problem using trigonometry.

A 3,700-year old Babylonian clay tablet reveals an ancient method of constructing right-angled triangles that makes it the world’s oldest and most accurate trigonometric table.