[cairo] Shouldn't Cairo use/offer degrees rather than radians?

[Lawrence D'Oliveiro]

On Tue, 27 Jun 2017 11:37:07 +0200, David Kastrup wrote:

> Lawrence D'Oliveiro <ldo at geek-central.gen.nz> writes:
> 
>> Trig calculations are usually easier in radians.  
> 
> Nobody uses Taylor series for actual trig calculations.

Not that I care. This is the kind of thing I care about:

    arc_length = radius * angle

That kind of calculation only makes sense if “angle” is in radians.