Day: September 18, 2017

Right-angled triangle trigonometry

Right-angled triangle trigonometry  Introduction Trigonometry is the study of the relations between the sides and angles of triangles. The word “trigonometry” is derived from the Greek words trigono, meaning “triangle”, and metro, meaning “measure”. Though the ancient Greeks, such as Hipparchus and Ptolemy, used trigonometry in their study of astronomy […]