On 2025-10-15 22:22 (-4), Bald Eagle wrote:
> 
> It appears that at 90 degrees (pi/2), tan and sec do not equal Inf.
> so
> #declare csc = function (N) {select (sin(N), 1/sin(N), Inf, 1/sin(N))}
> failed.
> I had to test against 1E10.

This isn't so much a bug as a floating point limitation.  Pi/2 has no
exact representation in binary, so you never get exactly 90 degrees.

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