Ah, that's a missing link I hadn't thought of.

This was a result of converting degrees to radians. There is another way as well.

    from math import sin, acos

    def nines(repeat: int) -> float:
          repeated = 2 / int('9' * repeat)
          value = sin(repeated) * acos(repeated) * (10 ** repeat)
          return value

      nines(18)

I'm sure this can be edited to accept other values in the same way.

Took a while to convince me, but you got there.