Revise using the sine and cosine rules to find a side or angle in a triangle for your National 5 maths exam with Bitesize Scotland interactive practice quizzes covering feedback and common errors.

Next, think about the relationship between sine, cosine and the circle. ... The triangle relationship is crucial to the definition of the tangent() function.

A 3,700-year old Babylonian clay tablet reveals an ancient method of constructing right-angled triangles that makes it the world’s oldest and most accurate trigonometric table.