Trigonometric functions

Learn how the trigonometric ratios are extended to all real numbers using algebra. Start solving simple problems that involve this new definition of the trigonometric functions.

Unit circle introduction

Radians

The Pythagorean identity

Special trigonometric values in the first quadrant

Trigonometric values on the unit circle

Graphs of sin(x), cos(x), and tan(x)

Amplitude, midline, and period

Transforming sinusoidal graphs

Graphing sinusoidal functions

Sinusoidal models

Long live Tau