A closer look at the sine Whiteboard exercise Play

A closer look at the sine, the cosine and the tangent Whiteboard exercise Play

A closer look at the trigonometric ratios Student activity Play

A cone Whiteboard exercise Play

A cone Student activity Play

A simple identity Student activity Play

Altering the  y-scale and the  x-scale Student activity Play

Altering the  y-scale and the  x-scale Whiteboard exercise Play

Amplitude of the trigonometric functions Whiteboard exercise Play

An application of the sine and cosine rules Whiteboard exercise Play

An application of the sine and cosine rules Student activity Play

Applying the difference identity for the cosine Whiteboard exercise Play

Applying the sum and difference identities for the sine and cosine Student activity Play

Applying the sum and difference identities for the sine and cosine Whiteboard exercise Play

Approximate values of the cosine function Simulation Play

Are all trigonometric functions really necessary? Student activity Play

Area between the graph of the sine and cosine function and the x-axis Whiteboard exercise Play

Basic trigonometric equations involving the sine and the cosine functions Student activity Play

Basic trigonometric functions Whiteboard presentation Play

Basic trigonometric functions Class activity Play

Basic trigonometric identities Whiteboard exercise Play

Basic trigonometric identities Student activity Play

Changing the sign of an angle Student activity Play

Comparing the graphs of the sine and the cosine Student activity Play

Comparison of the graphs of the sine and the cosine functions Simulation Play