Trig Cheat Sheet, Trig Identities, Inverse Trig Functions Cheat Sheet

# Trig Cheat Sheet, Trig Identities, Inverse Trig Functions Cheat Sheet

## Trig Cheat Sheet

Trig Cheat Sheet: Trigonometry is the study of triangles, which contain angles, of course. Get to know some special rules for angles and various other important functions, definitions, and translations. Sines and cosines are two trig functions that factor heavily into any study of trigonometry; they have their own formulas and rules that you’ll want to understand if you plan to study trig for very long.

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Definition of the trig functions

### Double Angle Formulas

As you study trig, you’ll find occasions when you need to change radians to degrees, or vice versa. A formula for changing from degrees to radians or radians to degrees is:

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