While there are countless threads suggesting books on Trigonometry, there are none that complement the style of Hardy's book. What I mean is:
a) The style being more illustrative of what is going on under the hood rather than throwing random formulae at the reader with no common chain of thought.
$\star$ b) Lack of intriguing and challenging problems. I couldn't find any that at least remotely came close to being of the same style of problems featured in Hardy's book. This is mainly the reason I am asking the community for help.
Are there any such texts that offer problems of such caliber while also showing trigonometric applications like trigonometric optimization problems, difficult limits and offer a narrative of mostly standard trigonometric topics(elementary or not)?
I was in a hunt for looking at trigonometric books of the same era but I am yet to pinpoint any (well, except the Hobson's treatise but it lacks a few too many topics in my opinion). So any post-Hardy tripos book anyone knows of?
