### Trig. Ratios for negative multiples 30, 45 and 60 degrees : ExamSolutions

In this tutorial I show you how to calculate the exact values of sin, cos and tan for negative multiples of 30 and 60 degrees. To see this and other tutorials go to http://www.examsolutions.co.uk/maths-tutorials/Core-maths/trigonometry/trig-ratios/60-30-45-multiples-tutorial.php

Length:
06:04