59 Simple Trig Equations Chapter 10 section 4 Edexcel Pure AS Level

[nathantj]

Hi, do you think it's necessary to have the knowledge of CAST diagrams or can I completely rely on using the graphs for these questions? I feel like I am more confident with the graphs as oppose to the CAST diagrams.

[jawadsobhani]

Why didn’t you do example13 . Is it too hard bruh