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

An angle can be calculated using an equation that relates the corners of a triangle (using the concepts of sine, cosine or tangent) to the length (distance) of the side opposite it.

Revise using bearings in trigonometry for your National 5 maths exam with Bitesize Scotland interactive practice quizzes covering feedback and common errors.