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Fix asin losing precision near x = 1

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apoorva-01
2026-07-10 00:17:54 +05:30
parent 1a6e845004
commit 02f1e51c3b
3 changed files with 10 additions and 2 deletions
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decimal.mjs
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@@ -932,7 +932,8 @@ P.inverseSine = P.asin = function () {
Ctor.precision = pr + 6;
Ctor.rounding = 1;
x = x.div(new Ctor(1).minus(x.times(x)).sqrt().plus(1)).atan();
// See https://github.com/MikeMcl/decimal.js/issues/249
x = x.div(new Ctor(1).minus(x).times(new Ctor(1).plus(x)).sqrt().plus(1)).atan();
Ctor.precision = pr;
Ctor.rounding = rm;