Re: Delphi Math Unit -- Books
Posted by webmaster Guido on December 16, 2002 at 03:22:50:
In Reply to: Delphi Math Unit -- Books posted by p12219 on December 16, 2002 at 01:31:19:
: Anyone know of a book telling how to use the Delphi math unit's with examples. I work with Trig, Angles, Bearings, Sin, Arcsins, Tan, etc.. I have purchased several books on Delphi starting with Delphi 2, delphi 3, Delphi 5 and Delphi 6, now I see Delphi 7 books being advertised. I am tired of buying "How to books" only to find out that they avoid all mention of the Math Unit or Math applications. I am a past Turbo Pascal user and back in the old days(-; you could find many source codes and math examples. What happened?---If you know of a book source, I would appreciate hearing from you.
Sorry, I don't recall any specific books, but here's a very useful source on the web: efg's Computer Lab: Delphi Math Info.
Some basic info for those not familiar with Delphi's MATH unit:
Starting with Delphi 4, every version has the Math unit (it was not included in the Standard edition of D2 nor D3, only the Professional and Client/Server versions had the Math unit).
Some math functions like Sin() and Cos() are in the System unit, others like Tan() and the important DegToRad are in the Math-unit. DegToRad = "Degrees To Radians" is needed because the trigonometric functions require the angles expressed in radians; for a small example, see the end of this post.
then you have to change it to:
procedure TForm1.btnCalculateClick(Sender: TObject);