A closer look at the sine Whiteboard exercise Play

A closer look at the trigonometric ratios Simulation Play

A closer look at the trigonometric ratios Student activity Play

A cone Student activity Play

A cone Whiteboard exercise Play

A linear function in the argument Student activity Play

A linear function in the argument Whiteboard exercise Play

A simple identity Student activity Play

A staircase Student activity Play

A tide Whiteboard exercise Play

A tide Student activity Play

A vibrating beam Whiteboard exercise Play

A vibrating beam Student activity Play

A water wheel Student activity Play

Absolute value and graphs of trigonometric functions Student activity Play

Absolute value and graphs of trigonometric functions Whiteboard exercise Play

Amplitude of the trigonometric functions Whiteboard exercise Play

Applying double-angle formulas to prove a trigonometric identity Whiteboard exercise Play

Applying the difference identity for the cosine Whiteboard exercise Play

Applying the sum identity for the sine Whiteboard exercise Play

Applying trigonometric identities to equations Student activity Play

Applying trigonometric identities to equations Whiteboard exercise Play

Are all trigonometric functions really necessary? Student activity Play

Basic periods of trigonometric functions Student activity Play

Basic trigonometric equation Animation Play