Consume Product

Never thought to be impossible, but the tautology of sine to the measurements never really instilled intrest in a formal proof.

First formal proof widely published in 2009. Second a few years after, and directly references the first as inspiration.

https://www.cut-the-knot.org/pythagoras/Proof109.shtml
Pythagorean Theorem via Half-Angle Formulas
Nuno Luzia
Universidade Federal do Rio de Janeiro,
Instituto de Matemática
Rio de Janeiro 21941-909, Brazil

References
J. Zimba, On the Possibility of Trigonometric Proofs of the Pythagorean Theorem, Forum Geometricorum, Volume 9 (2009) 275-278.



Even reddit disproved this as they did the first time this ridiculous claim was made.