# Trigonometry

Having an understanding of trigonometry is useful for maths, science, architecture, music, surveying, and digital imaging.

## Trigonometry

The links to these instructional YouTube clips come from The Organic Chemistry Tutor.

Introduction to trigonometry[length: 21m:51s]
This video details  an introduction to the sine, cosine and tangent ratios and how to remember them.

Graphing trigonometric functions[length: 1h:07m:57s]
This video details how to graph the trig functions and other aspects such as how to identify the amplitude, period, phase shift, vertical shift, and midline of a sine or cosine function.

This video details how to  work with degrees and radians.

Unit circle[length: 59m:25s]
This video details how to construct and remember the unit circle.

Reference angles[length: 19m:24s]
This video details how to work with larger angles.

Even and odd trigonometric functions[length: 10m:50s]
This video details how to use even and odd identities to help evaluate sine,cosine and tangent functions.

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