Alex Tabarrok points to a new paper this morning that should thrill data nerds and chart enthusiasts everywhere. Steven Piantadosi of the University of Rochester has produced a simple equation ...

GCSE Eduqas Trigonometry - Eduqas Trigonometric graphs - Higher The three trigonometric ratios; sine, cosine and tangent are used to calculate angles and lengths in right-angled triangles.

It's one thing to have data to demonstrate your point, it's another to communicate it effectively. Here are types of charts and graphs with explanations of when to use (and not use) each.

Use as an introduction or recap to lessons on trigonometry. Discuss with students that the different trig functions are based on ratios and show this by comparing similar triangles.