> Then there are a lot of small details like the fact that sin and cos return numbers in the 0..1 range instead of 0..2Pi range. The [0,2pi) interval is rather

> Then there are a lot of small details like the fact that sin and cos return numbers in the 0..1 range instead of 0..2Pi range. The [0,2pi) interval is rather strange for an output or do you mean the arcus functions?