How to solve trigonometric equations using the Quadrant Rule (negative angles)

Here I show you how to use the quadrant rule or CAST diagram to solve trigonometric equations in different ranges. It saves having to use trigonometric graphs and so makes a solution quicker and more efficient. YOUTUBE CHANNEL at https://www.youtube.com/ExamSolutions EXAMSOLUTIONS WEBSITE at https://www.examsolutions.net/ where you will have access to all playlists covering pure maths, statistics and mechanics. FACEBOOK: https://www.facebook.com/examsolution NEW INSTAGRAM: https://www.instagram.com/examsolutionsguy/ TWITTER: https://twitter.com/ExamSolutions THE BEST THANK YOU: https://www.examsolutions.net/donation/