Little explorations with HP calculators (no Prime)

[pier4r]

If no otherwise stated, the problems on brilliant normally accept only integers.

The funny part is that you solved with "basic trigonometry" a level 5 problem (the highest challenge there in brilliant, aside from community extras). Now it is true that it spurred a bit more comments than the problems before (level 3) and it may be a simpler case because reported by me (1), but still I thought those were a bit harder to solve.

Anyway when I have to refresh about triangle relationship I use a little handbook, like those that one finds in bookshops and are quite compact. Not all is there, but those helps at times.

(1) I do not copy and paste everything here, I copy what I attempt to solve, so I may select the simpler problems.