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正割

日本語

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正割

Where it comes from

単位円の始線OD、動径OA、動径の回転角θとしたとき、点Aにおける円の接線と半直線ODの交点Eについて◌̅OE= sec θが成り立ち、線分OEが円の割線であることから。

noun せいかつ

  1. 三角関数 直角三角形における、斜辺の隣辺に対する比。余弦の逆数。セカント（sec）。

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MLA

"正割." Wiktionary, via Micwyn, micwyn.com/word/ja/%E6%AD%A3%E5%89%B2. Accessed 6 Nov. 2026.

APA

正割. (n.d.). In Wiktionary, via Micwyn. Retrieved November 6, 2026, from https://micwyn.com/word/ja/%E6%AD%A3%E5%89%B2

Chicago

"正割." Wiktionary, via Micwyn. Accessed November 6, 2026. https://micwyn.com/word/ja/%E6%AD%A3%E5%89%B2.

BibTeX
@misc{micwyn_2026,
  title = {正割},
  howpublished = {Wiktionary, via Micwyn},
  year = {2026},
  url = {https://micwyn.com/word/ja/%E6%AD%A3%E5%89%B2},
  urldate = {2026-11-06}
}