Talk:Floating-point arithmetic: Difference between revisions

Revision as of 14:04, 11 March 2021

Revision as of 18:24, 11 March 2021

Line 89:

:hello @Vincent, sorry for objecting ... imho (school math) and acc. to wikipedia (https://en.wikipedia.org/wiki/Trigonometric_functions, esp. 'Summary of relationships between trigonometric functions' there) "tan(x) = sin(x) / cos(x)", once you get a proper cos at pi()/2 [use sin(pi()/2-x), same reference], you can calculate a proper tan with overflow (#DIV/0! in 'calc'),

perhaps it won't work 'in IEEE' (then it's a weakness there), but developers or users can achieve proper results once they have proper sin values for the first quadrant, <!-- Template:Unsigned IP --><small class="autosigned">—&nbsp;Preceding [[Wikipedia:Signatures|unsigned]] comment added by [[Special:Contributions/77.0.177.112|77.0.177.112]] ([[User talk:77.0.177.112#top|talk]]) 14:03, 11 March 2021 (UTC)</small> <!--Autosigned by SineBot-->

::"tan(x) = sin(x) / cos(x)" is a mathematical definition on the set of the real numbers. This has nothing to do with a floating-point specification. — [[User:Vincent Lefèvre|Vincent Lefèvre]] ([[User talk:Vincent Lefèvre|talk]]) 18:23, 11 March 2021 (UTC)