### Introduction to Trigonometry

Trigonometry is an important branch of Mathematics. The word Trigonometry has been derived from three Greek words Tri (Three), Goni (Angles), Metron (Measurement). Literally it means “measurement of triangles” The origin of trigonometry have been traced back to the Egyptians of the 13 century B.C., whose tables of shadow lengths correspond to today's tangent and […]