Trigonometric ratios are used to find the unknown side or angle of a right-angled triangle. There are three different trigonometric ratios, sin (θ), cos (θ), and tan (θ). Each is defined according to ...

Trigonometry: In many cases, especially when working on complex math problems or in engineering contexts, calculating an angle requires applying trigonometry principles—specifically, using sine, ...

Learn about three trigonometric ratios in similar right-angled triangles with this BBC Bitesize Maths article. For students between the ages of 11 and 14.

An animated guide to using trigonometry. Trigonometric terms are explained and examples are used to show how to find unknown angles and sides for right-angled triangles.

This takes students through six matching activities, three on finding sides and three on finding angles. Designed to create discussion and to be used as a starter/plenary but use how you wish. KS3 ...

Home | Mathematics | Trigonometry | Angles of elevation and depression Angles of elevation and depression Angles of elevation and depression are angles that are given from above or below a horizontal ...

Using a unit circle can help develop a deeper understanding of trigonometry in right-angled triangles. In this maths lesson, students explore the behaviour of a radius vector as it rotates around a ...