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

National 4 Trigonometric skills Calculating an angle in a right-angled triangle Trigonometry helps solve problems involving right-angled triangles using the sine, cosine or tangent ratios.

After taking this class, users will be able to categorize triangles by their sides and angles, calculate missing angles based on the measurements of other angles, and determine the area of a triangle.