Right Triangle Definitions of Trigonometric Functions

(Remember… SOHCAHTOA!!)

The Unit Circle

Values of Trigonometric Functions for Special Angles

Angle
Degrees	Radians
	0	0	1	0
				1
		1	0	undefined

Trigonometric Identities

Fundamental Identities

Pythagorean Identities

Power-Reducing Identities

Double Angle Identities

Half-Angle Identities

Sum and Difference Identities

Conversion of Angular Measure

From	To	Multiply By:
Radians	Degrees
Degrees	Radians

Graphing Sine, Cosine, and Tangent