In Python 2.6, I found that the Decimal equivalent of `sqrt(pi)` is

```
Decimal(pi).sqrt()

```

Is there anything like that for sin, cos or other (inverse) trigonometric functions?

The [docs](http://docs.python.org/library/decimal.html) only mention how to calculate `cos` and `sin` computationally. `Decimal(pi).cos()` doesn't exist nor does `from decimal import cos`

**Update**: the problem with using the default trigonometric functions is that it defeats the point of using `Decimal` if I convert them from float and back every time I want to calculate something. (Also typing `Decimal` around every calculation is annoying, but I guess I could make a wrapper function)