# Maths GCSE Trigonometric Ratios

Trigonometry is concerned with the calculation of sides and angles in triangles, and involves the use of three important ratios- Sine, Cosine and Tangent.

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• Tangent
• Hypotenuse
• Opposite
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## 2. Which side two sides require the use of the Sine ratio?

• Opposite and Hypotenuse

## 3. How is Sine used in relation to the two sides?

• Sine=Opposite / Hypotenuse
• Sine= Hypotenuse / Opposite
• Sine= Hypotenuse x Opposite

## 4. How is Cosine used in relation to the two sides?

• Cosine= Opposite x Hypotenuse