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, aco

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.