Are all trigonometric functions really necessary? Student activity Play

Finding representations of trigonometric functions Simulation Play

Finding the length of a side of a right-angled triangle Whiteboard exercise Play

Finding the measure of an angle of a right-angled triangle Whiteboard exercise Play

Finding the period Student activity Play

Finding the period Simulation Play

Functions 'similar' to trigonometric functions Animation Play

Looking for the formula for a trigonometric function Simulation Play

Looking for the formula for a trigonometric function Student activity Play

Sum of trigonometric functions – investigations Animation Play

The height of a tree Animation Play

Trigonometric identities – investigations Student activity Play

Trigonometric identities – investigations Simulation Play

Trigonometric ratios in a right-angled triangle Whiteboard exercise Play

Trigonometric ratios in a right-angled triangle Student activity Play

Trigonometric ratios – a lighthouse Whiteboard exercise Play

Trigonometric ratios – distance to a star Whiteboard exercise Play

Trigonometric ratios – problems Student activity Play

Trigonometric ratios – the altitude of the Sun Whiteboard exercise Play

Use of a calculator Whiteboard presentation Play

Use of a calculator Interactive lesson Play