Learn the values for cos, sin and tan at the important angles of 0, 30, 45, 60 and 90 degrees. Tom introduces the topic via the graphs of sin and cos, Susan derives the values for sin and cos using Pythagoras’ Theorem and Trigonometry, and Bobby explains how to calculate the values for tan.

This is the fifth lesson in a new series with the Maths Appeal duo – Bobby Seagull and Susan Okereke – and Tom Rocks Maths where we’ll be exploring the GCSE Maths syllabus to show the world that maths is accessible to everyone!

Bobby and Susan Q&A here.

Tom’s Livestream here.