Save guides, add subjects and pick up where you left off with your BBC account. The trigonometric ratios sine, cosine and tangent are used to calculate angles and sides in right angled triangles ...

Sin, cos and tan are commonly used abbreviations for the three trigonometric functions sine, cosine and tangent. Back to top How to calculate an unknown angle in a right-angled triangle ...

Trigonometry is a branch of mathematics that studies relationships between the sides and angles of triangles. Skip to main content. ... The inverses of sin(x), cos(x), and tan(x), are arcsin(x ...

There are three main trigonometric functions - Sine θ (sin θ), Cosine θ (cos θ) and Tangent θ (tan θ). Sin θ - Ratio of P erpendicular to H ypotenuse. Cos θ - Ratio of B ase to H ypotenuse ...

This angle is then used to describe the ratios of the sides of the right-angled triangle through sin, cos and tan. Read more: Your guide to solving the next online viral maths problem.