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c78a893862
Added the following new trigonometric functions:
exsec(x [,eps]) exterior trigonometric secant
aexsec(x [,eps]) inverse exterior trigonometric secant
excsc(x [,eps]) exterior trigonometric cosecant
aexcsc(x [,eps]) inverse exterior trigonometric cosecant
Added to test 95dd and test9500.trigeq.cal to the calc regression test
suite to perform extensive test of trigonometric functions.
Added to test 34dd, some if the missing inverse trigonometric tests.
75 lines
2.3 KiB
Plaintext
75 lines
2.3 KiB
Plaintext
NAME
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csc - trigonometric cosecant
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SYNOPSIS
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csc(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 real
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DESCRIPTION
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Calculate the trigonometric cosecant of x to a multiple of eps, with error less
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in absolute value than .75 * eps.
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This function is equivalent to:
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csc(x) = 1 / sin(x)
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EXAMPLE
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; print csc(1/2), csc(5/7), csc(42/7)
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2.08582964293348818577 1.52653601091884339347 -3.57889954725440563736
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; print csc(1, 1e-5), csc(1, 1e-10), csc(1, 1e-15), csc(1, 1e-20)
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1.1884 1.1883951058 1.188395105778121 1.18839510577812121626
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; print csc(2 + 3i, 1e-5), csc(2 + 3i, 1e-10)
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~0.09047318155450436310+~0.04120099965201690801i ~0.09047320975303232503+~0.04120098628887626238i
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; pi = pi(1e-20)
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; print csc(pi/6), csc(pi/2), csc(pi)
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2 1 378303066284076833726.92240766640467212978
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; # NOTE: The huge value for csc(pi) is because the pi variable is not exactly pi.
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LIMITS
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0 < eps < 1
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LINK LIBRARY
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NUMBER *qcsc(NUMBER *x, NUMBER *eps)
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COMPLEX *c_csc(COMPLEX *c, NUMBER *eps)
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SEE ALSO
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sin, cos, tan, cot, sec
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asin, acos, atan, acot, asec, acsc
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versin, coversin, vercos, covercos
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aversin, acoversin, avercos, acovercos
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haversin, hacoversin, havercos, hacovercos
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ahaversin, hacoversin, havercos, ahacovercos
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exsec, aexsec, excsc, aexcsc
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epsilon
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## Copyright (C) 1999,2023 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: 1995/11/13 03:49:00
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## File existed as early as: 1995
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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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