A black box Student activity Play

A car moving at constant speed Animation 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 constant function Animation Play

A constant source of voltage Student activity Play

A constant source of voltage Simulation Play

A constant source of voltage Whiteboard exercise Play

A function Student activity Play

A linear function Animation Play

A mobile source and a mobile observer Student activity Play

A mobile source and a mobile observer Animation Play

A mobile source and a stationary observer Student activity Play

A negative value of the discriminant Whiteboard exercise Play

A negative value of the discriminant Student activity Play

A new price Student activity Play

A new price Whiteboard exercise Play

A simple identity Student activity Play

A stationary source and a mobile observer Student activity Play

Absolute value and graphs of trigonometric functions Student activity Play

Absolute value and graphs of trigonometric functions Whiteboard exercise Play

Absolute value of a function Whiteboard exercise Play

Absolute value of a function Student activity Play

Absolute value of a number Whiteboard exercise Play

Absolute value of a number, modulus function Student activity Play