>>13252597It's "wrong" because the length of the red leg is supposedly 1 because if it's not a positive real then all of math breaks apart and no one has any idea what to do next.
However as we've been through this at least a hundred times already, using complex lengths DOES apply to our reality
https://en.wikipedia.org/wiki/Imaginary_time , it's more of a matter of not knowing what to do with it or how to deal with the division by zero that arises from it, as you can see from the identities involving division by the hypotenuse of your triangle.
