You might have found it boring in school maths classes, but Matt Parker thinks we should all learn to love trigonometry.

The ‘Love Triangle’ author talks to Tim Harford about the maths used in GPS, architecture and special effects.

Presenter: Tim Harford
Producer: Debbie Richford
Series Producer: Tom Colls
Production Co-ordinator: Brenda Brown
Sound Mix: Nigel Appleton
Editor: Richard Vadon