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. Use as an introduction or ...

For two millennia, mathematicians have shown the Pythagorean theorem to be true through geometry and algebra, never ...

Save guides, add subjects and pick up where you left off with your BBC account. When you are asked to prove something, ignore the right hand side of the equals sign in your working as we are not ...