Revise trigonometric ratios of sine, cosine and tangent and calculate angles in right-angled triangles with this BBC Bitesize GCSE Maths OCR study guide.

The trigonometric function cosine, or cos, is fundamental in the study of mathematics, particularly in the areas of geometry and trigonometry. It is used to define the relationship between the angles ...

Revise trigonometric ratios of sine, cosine and tangent and calculate angles in right-angled triangles with this BBC Bitesize GCSE Maths Eduqas guide.