What does it mean when you say the sine value is normalized between 0 and 1? Are you talking about the inputs or the outputs?
Do the sine and cosine material node both output from 0 to 1?
I think I understand that the input is dependent on the period that is set in the node. This means that if the period is at the default 1 then you would input a degrees angle as Angle/360.
Does this mean that cosine(90/360) outputs .5?
Can you input negative numbers into these nodes (would it understand that -.25 is .75 with a period of one)?
The documentation directly conflicts itself from one sentence to the next.