Scilab Home page | Wiki | Bug tracker | Forge | Mailing list archives | ATOMS | File exchange
Please login or create an account
Change language to: English - Français - Português - Русский

Please note that the recommended version of Scilab is 6.0.1. This page might be outdated.
See the recommended documentation of this function

Scilab help >> Elementary Functions > Trigonometry > asecd

asecd

引数の要素毎の逆割線を計算し,結果を度単位で返す.

呼び出し手順

y = asecd(x)

引数

x

実数または複素数の配列

y

実数または複素数の配列

説明

引数の要素毎の逆割線を計算し,結果を度単位で返します. 絶対値が 1より大きい実数入力データの 場合, 結果は実数で [-90 90]の範囲となります.

asecd(x)asec(x)*180/%piと等価です.

x=[1 2 -2 sqrt(2) -sqrt(2) 2/sqrt(3) -2/sqrt(3) -1];
asecd(x)

参照

  • asec — 引数の要素毎の逆割線を計算する.
  • secd — 要素毎の割線(引数の単位:度)

参考文献

  • Kahan, W., "Branch cuts for complex elementary functions, or, Much ado about nothing's sign bit", Proceedings of the joing IMA/SIAM conference on The State of the Art in Numerical Analysis, University of Birmingham, A. Iserles and M.J.D. Powell, eds, Clarendon Press, Oxford, 1987, 165-210.
Scilab Enterprises
Copyright (c) 2011-2017 (Scilab Enterprises)
Copyright (c) 1989-2012 (INRIA)
Copyright (c) 1989-2007 (ENPC)
with contributors
Last updated:
Mon Oct 01 17:40:24 CEST 2012