> sin(1) = 0 you are only going to confuse them.

Not really, pretty much every single one would assume you just forgot the pi, because everyone writes “sin(1pi)” and never actually “sin(3.14…)” because no one ever writes down numbers in the unit of radians, they already convert to half rotations or full rotations by scaling with pi. Imagine if someone went “nanometers are a dumb unit, because I always write down my numbers as h=342 x 10^-9m” that last part “10^-9m” is just nm. In the same way that sin(1.432pi) might as well just be written sin(1.43*rotation). Arguing for radians is arguing that the most natural way to write it is sin(8.985). Which you will pretty much never see anyone do.