trigonometry

• the branch of mathematics that deals with triangles
and their sides and angles.
• the study of the relationships between
the sides and angles of triangles, and
the associated calculations,
particularly trigonometric functions
relating to right-angled triangles.

EXAMPLE:



more

Basic Trigonometry ~ Video
https://www.youtube.com/watch?v=F21S9Wpi0y8

Graphs of Trigonometric Functions
http://www.intmath.com/trigonometric-graphs/trigo-graph-intro.php

Trigonometry
https://en.wikipedia.org/wiki/Trigonometry

Trigonometric Functions
https://en.wikipedia.org/wiki/Trigonometric_functions