CAST Diagrams and Quadrant Rule - Solving Trigonometric Equations A Level Maths

Our first look at solving Trigonometric equations using CAST Diagrams and the quadrant rule, instead of graphically!

Knowing the signs of Trigonometric functions is also really handy, so we explain where CAST Diagrams come from too.

For the TRIGONOMETRY chapter of the NEW A LEVEL MATHS Year 1 for AQA, Edexcel, OCR and OCR MEI!