Timeline for Is there any particular reason to only include 3 out of the 6 trigonometry functions?
Current License: CC BY-SA 4.0
7 events
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| Jun 30, 2023 at 21:51 | comment | added | Barmar | Isn't this a good reason why the language should include these functions, because it's hard for the application to implement them itself without losing accuracy? | |
| Jun 30, 2023 at 15:33 | comment | added | chux | "For sin, cos, tan and others, that limit is quite difficult but not impossible to achieve" is the classic table-maker dilemma. With high precision floating point, it is certainly infeasible to fully test. AFAIK, Getting a ULP of 0.500...0001 or less is reasonable. ULP <= 0.5 is very challenging. | |
| Jun 30, 2023 at 13:51 | comment | added | kaya3 |
Good point, and users who do want high precision often only need it in a certain range of inputs, which might be different to the range of inputs that other users need precision on. I think the same reason is why many standard libraries offer log (1 + x) as a built-in function ─ it allows higher precision for small x.
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| S Jun 30, 2023 at 13:47 | review | First answers | |||
| Jun 30, 2023 at 14:41 | |||||
| S Jun 30, 2023 at 13:47 | history | edited | kaya3 | CC BY-SA 4.0 |
added 61 characters in body
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| S Jun 30, 2023 at 12:21 | review | First answers | |||
| Jun 30, 2023 at 13:33 | |||||
| S Jun 30, 2023 at 12:21 | history | answered | gnasher729 | CC BY-SA 4.0 |