I recently learned: > It has been claimed that Euler's identity appears in his monumental work of mathematical analysis published in 1748, Introductio in analy

I recently learned: > It has been claimed that Euler's identity appears in his monumental work of mathematical analysis published in 1748, Introductio in analysin infinitorum. However, it is questionable whether this particular concept can be attributed to Euler himself, as he may never have expressed it. https://en.m.wikipedia.org/wiki/Euler's_identity https://en.m.wikipedia.org/wiki/Euler's_identity But it is still cool. https://youtu.be/yPl64xi_ZZA https://youtu.be/yPl64xi_ZZA