While learning about trigonometric formulas, we consider them for right-angled triangles only. The different problems of trigonometric ratios, product identities, and Pythagorean identities can be ...

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.

We can use trigonometric identities to calculate angles as well as the lengths of sides. In order to calculate angles we must know two sides of the right-angled triangle. Look at this triangle: We ...

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 ...