Ian,
Is this just a variation of https://github.com/golang/go/issues/6794 ?
Peter
On Sunday, July 30, 2017 at 10:22:54 PM UTC-4, Ian Lance Taylor wrote:
>
> On Sun, Jul 30, 2017 at 10:40 AM, <mhip...@gmail.com <javascript:>>
> wrote:
> >
> > I just ran this code on my pc:
> >
> > package main
> >
> > import (
> > "fmt"
> > "math"
> > )
> >
> > func main() {
> > const ali = 4e20
> > fmt.Println(math.Sin(ali))
> > }
> >
> >
> > and got this result:
> >
> > 1.3471173831553043e+258
> >
> > Why Sin result goes more than 1 ???????????????????
>
> It's a bug. Consider filing a bug.
>
> The current implementation of math.Sin says "Results may be
> meaningless for x > 2**49 = 5.6e14." It would be nice to fix that if
> it's not too expensive. Of course the results of Sin are fairly
> meaningless for such large values in any case, as the values will lack
> precision, but we may as well try to at least get a valid range.
>
> Ian
>
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