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Toby Bartels (talk | contribs) →Definition of arccot: ISO standard |
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Actually, come to think of it, since that book came out in 1964 (before the Internet), and the current standard displayed on the NIST website is different, wouldn't that mean that the definition given in that book is outdated? Unless the NIST stopped being the international standard some time between 1966 and whenever they got a website, how is this even up for debate? [[User:Math Machine 4|Math Machine 4]] ([[User talk:Math Machine 4|talk]]) 23:54, 19 December 2020 (UTC)
NIST is not an international standard; it's a national standard (hence the N). The ISO (which is international, hence the I) uses 0 < <i>θ</i> < π, or at least it did in 2009. See page 47 of the PDF at https://people.engr.ncsu.edu/jwilson/files/mathsigns.pdf (this is a scan of the 2009 standard, since you have to pay over $100 for the current standard, but I don't believe that it has changed). This is also in several American trigonometry textbooks that I've used, so I can cite them if you want American sources (to go with NIST and Wolfram, which are also American). [[User:Toby Bartels|Toby Bartels]] ([[User talk:Toby Bartels|talk]]) 01:50, 11 March 2021 (UTC)
== Radian… and [[:Category:Dimensionless numbers|category]] ==
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