Standard Trigonometric Equations Article Added

I have now finished Standard Trigonometric Equations. I am deliberately revisiting a familiar A-level topic, developing it from the basic definitions rather than simply quoting results without fully explaining them. My aim is to show what a deep understanding of even a basic topic can achieve, and how it can greatly simplify some TMUA questions.

In my experience, most students preparing for the TMUA would benefit greatly from the ideas in this article, so I recommend having a read to see why. Don't say I didn't tell you! 😄