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Mathematics
Geometry and Measures
Mensuration and Calculation
Pythagoras and Trigonometry

Pythagoras and Trigonometry

What You Need to Know

Apply Pythagoras’ theorem $a^2 + b^2 = c^2$ .
Use trigonometric ratios: $\sin \theta = \frac{\text{opposite}}{\text{hypotenuse}}$ , $\cos \theta = \frac{\text{adjacent}}{\text{hypotenuse}}$ , and $\tan \theta = \frac{\text{opposite}}{\text{adjacent}}$ .
Find angles and lengths in right-angled triangles.
Apply these concepts to general triangles in two and three-dimensional figures.

Revision Notes

Pythagoras' Theorem

Right-Angled Trigonometry

Trigonometry and Pythagoras in 2D and 3D

Practise with Past Papers Key Terms & Definitions

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