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Use of a calculator

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Trigonometric ratios in a right-angled triangle

The height of a tree

Finding the length of a side of a right-angled triangle

Trigonometric ratios – a lighthouse

Trigonometric ratios – distance to a star

Finding the measure of an angle of a right-angled triangle

Trigonometric ratios – the altitude of the Sun

Looking for the formula for a trigonometric function

Trigonometric identities – investigations

Finding the period

Sum of trigonometric functions – investigations

Finding representations of trigonometric functions

Functions 'similar' to trigonometric functions