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IDProjectCategoryView StatusDate SubmittedLast Update
0006703JEDI Code LibraryJclMathpublic2020-08-09 10:592020-08-09 10:59
ReportermhAssigned To 
PrioritynormalSeveritymajorReproducibilityalways
Status newResolutionopen 
Product Version 
Target VersionFixed in Version 
Summary0006703: Results from JclMath.ArcSec and System.Math.ArcSec differ
DescriptionI added a unit test as shown via steps below and when running it I get a huge difference of the values calculated by JclMath and System.Math.
Looking at the implementation of both functions I see they quite differ mathematically.

Result of the test run:
expected: <1,8247742815658> but was: <1,31681837202399>
Steps To ReproduceAdd the following implementation of a DUnit unit test to TestJCLMath.pas from qa\automated\dunit\unit and run it.

procedure TMathTranscendentalTest._ArcSec;
var
  x: Extended;

begin
  x := -3.98;

  while x < -1 do
  begin
    CheckEquals(Math.ArcSec(X), JclMath.ArcSec(X), PrecisionTolerance);
    x := x + 0.1;
  end;

  x := 1.00;

  while x < 4 do
  begin
    CheckEquals(Math.ArcSec(X), JclMath.ArcSec(X), PrecisionTolerance);
    x := x + 0.1;
  end;
end;
Additional InformationI selected IDE version 10.3 as 10.4 is not available in the list.
TagsNo tags attached.
Fixed in GIT commit
Fixed in SVN revision
IDE version10.3

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Issue History

Date Modified Username Field Change
2020-08-09 10:59 mh New Issue