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Talk:Trigonometric functions: Difference between revisions
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→Notes on precise sin implemented in Rexx: expanded on some comments. -- ~~~~
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<br>source code is ripped from a working example. This is the main reason the number of shown digits was increased from
<br>6 to 30. People should plainly see that the example as coded works perfectly. If another constructed version doesn't
<br>give the expected results, it might be time to re-read the prologue. Or better yet, use the prologue REXX code.
<br><br>It's important to note that '''numeric digits nnn''' is not what precision you ''want'', but what precision the
<br>REXX code ''uses''. One should always specify more than what is liked. Programmers most often forget that negative
<br>numbers consume an "extra" digit, and it's always better to be safe than sorry. If one wants 30 digit accuracy, then
<br>be prepared to over-specify the numeric digits (or just use the technique shown in the REXX example on the main page).
<br><br>The huge driver is mainly two statements with eight more to invoke the functions:
<lang rexx>showdigs=30 /*show only 30 digits of number. */
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