In my example you would not actually write it out but instead have something like this.

[sin(x) for x in sample]

My point is that the trig functions are abstract and useful in multiple domains and in most of these domains turns does not make sense. Turns only makes sense in geometry and maybe some physics but most of the time in these cases you might be better off working with other units, like say quaternions.

The fact is in the vast majority of literature trig functions take rads as arguments, it's the sane default for that reason alone.