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3abedd6713
In cases where the real value to the inverse versed sine and the inverse coversed sine function produces a complex value, the conversion from real to complex was incorrect. Added c_to_q(COMPLEX *c, bool cfree) to make is easier to convert a COMPLEX value that is real (imag part is 0) into a NUMBER and optionally free the COMPLEX value. The func.c code now uses c_to_q(). NOTE: There is a XXX bug marked in the f_aversin() and f_acoversin() that still needs to be fixed.
64 lines
2.0 KiB
Plaintext
64 lines
2.0 KiB
Plaintext
NAME
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acoversin - inverse coversed trigonometric sine
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SYNOPSIS
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acoversin(x [,eps])
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TYPES
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x number (real or complex)
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eps 0 < real < 1, defaults to epsilon()
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return number
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DESCRIPTION
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Calculate the inverse coversed sine of x to a multiple of eps with error less in
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absolute value than .75 * eps.
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The coversed sine function is sometimes called covers, or acosiv, or acvs,
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may be defined as:
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acoversin(x) = asin(1 - x)
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EXAMPLE
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; print acoversin(.5, 1e-5), acoversin(.5, 1e-10), acoversin(.5, 1e-15), acoversin(.5, 1e-20)
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0.5236 0.5235987756 0.523598775598299 0.52359877559829887308
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; print acoversin(1), acoversin(-5), acoversin(2 + 3i)
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0 1.57079632679489661923-2.47788873028847500481i -0.30760364953071124992-1.86416154415788242834i
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LIMITS
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0 < eps < 1
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LINK LIBRARY
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NUMBER *qacoversin(NUMBER *x, NUMBER *eps)
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COMPLEX *c_acoversin(COMPLEX *x, NUMBER *eps)
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SEE ALSO
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sin, cos, tan, cot, sec, csc
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asin, acos, atan, acot, asec, acsc
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versin, coversin
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aversin
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epsilon
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## Copyright (C) 2023 Landon Curt Noll
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##
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## Calc is open software; you can redistribute it and/or modify it under
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## the terms of the version 2.1 of the GNU Lesser General Public License
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## as published by the Free Software Foundation.
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##
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## Calc is distributed in the hope that it will be useful, but WITHOUT
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## ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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## or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
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## Public License for more details.
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##
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## A copy of version 2.1 of the GNU Lesser General Public License is
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## distributed with calc under the filename COPYING-LGPL. You should have
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## received a copy with calc; if not, write to Free Software Foundation, Inc.
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## 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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##
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## Under source code control: 2023/08/31 23:07:08
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## File existed as early as: 2023
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##
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## chongo <was here> /\oo/\ http://www.isthe.com/chongo/
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## Share and enjoy! :-) http://www.isthe.com/chongo/tech/comp/calc/
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