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Who introduced the term sinus cardinalis? I do not mean the abbreviation sinc, which was introduced 1953 by Woodward.

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    $\begingroup$ Before the close votes accumulate, I'd like to point out that this question is right in the middle of what the math-history tag is for: "Use this tag for questions concerning history of mathematics, historical primacies of results, and evolution of terminology, symbols, and notations. Consider if History of Science and Mathematics Stack Exchange is a better place to ask your question." A question can hardly be off-topic when there's a tag precisely for questions like that. $\endgroup$ – joriki Jun 24 '18 at 6:45
  • $\begingroup$ I suppose Woodward did, when he introduced the abbreviation in this paper in 1952. How can he introduce the abbreviation without the full expansion of it? He just doesn't mention it in written form, that's all. $\endgroup$ – Henno Brandsma Jun 24 '18 at 6:54
  • $\begingroup$ No he didn't. And it's very unlikely, that a modern English speaking author would introduce a Latin phrase. And then without mentioning it immediately proposes an abbreviation. $\endgroup$ – Darwin1871 Jun 24 '18 at 7:01
  • $\begingroup$ I had the suspicion that Euler did. But couldn't find it in the 'Introductio'. $\endgroup$ – Darwin1871 Jun 24 '18 at 7:03
  • $\begingroup$ Also asked at hsm.stackexchange.com/q/7474/72 , where there is an answer. $\endgroup$ – Joel Reyes Noche Sep 18 '19 at 2:41

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