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

[Lawrence D'Oliveiro]

On Fri, 30 Jun 2017 07:02:36 +0200, David Kastrup wrote:

> Lawrence D'Oliveiro <ldo at geek-central.gen.nz> writes:
> 
>> You do realize that your claim about Cairo’s “inability to reliably
>> draw a half circle that seamlessly connects with another half circle
>> under any rasterization” is complete nonsense, right?  
> 
> Sigh.  If you cannot specify an angle for pi for which sin(angle)==0,
> you will have rasterizations of half circle arcs that won't line up
> perfectly because you then cannot make the half circles butt up
> perfectly, and "too small to be noticeable" becomes a statistic rather
> than a static feature under rasterization.

There is no such situation.