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/* specfunc/gsl_sf_trig.h
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*
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* Copyright (C) 1996, 1997, 1998, 1999, 2000 Gerard Jungman
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or (at
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* your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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/* Author: G. Jungman */
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#ifndef __GSL_SF_TRIG_H__
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#define __GSL_SF_TRIG_H__
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#include <gsl/gsl_sf_result.h>
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#undef __BEGIN_DECLS
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#undef __END_DECLS
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#ifdef __cplusplus
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# define __BEGIN_DECLS extern "C" {
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# define __END_DECLS }
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#else
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# define __BEGIN_DECLS /* empty */
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# define __END_DECLS /* empty */
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#endif
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__BEGIN_DECLS
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/* Sin(x) with GSL semantics. This is actually important
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* because we want to control the error estimate, and trying
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* to guess the error for the standard library implementation
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* every time it is used would be a little goofy.
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*/
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int gsl_sf_sin_e(double x, gsl_sf_result * result);
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double gsl_sf_sin(const double x);
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/* Cos(x) with GSL semantics.
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*/
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int gsl_sf_cos_e(double x, gsl_sf_result * result);
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double gsl_sf_cos(const double x);
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/* Hypot(x,y) with GSL semantics.
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*/
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int gsl_sf_hypot_e(const double x, const double y, gsl_sf_result * result);
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double gsl_sf_hypot(const double x, const double y);
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/* Sin(z) for complex z
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*
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* exceptions: GSL_EOVRFLW
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*/
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int gsl_sf_complex_sin_e(const double zr, const double zi, gsl_sf_result * szr, gsl_sf_result * szi);
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/* Cos(z) for complex z
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*
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* exceptions: GSL_EOVRFLW
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*/
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int gsl_sf_complex_cos_e(const double zr, const double zi, gsl_sf_result * czr, gsl_sf_result * czi);
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/* Log(Sin(z)) for complex z
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*
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* exceptions: GSL_EDOM, GSL_ELOSS
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*/
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int gsl_sf_complex_logsin_e(const double zr, const double zi, gsl_sf_result * lszr, gsl_sf_result * lszi);
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/* Sinc(x) = sin(pi x) / (pi x)
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*
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* exceptions: none
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*/
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int gsl_sf_sinc_e(double x, gsl_sf_result * result);
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double gsl_sf_sinc(const double x);
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/* Log(Sinh(x)), x > 0
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*
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* exceptions: GSL_EDOM
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*/
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int gsl_sf_lnsinh_e(const double x, gsl_sf_result * result);
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double gsl_sf_lnsinh(const double x);
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/* Log(Cosh(x))
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*
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* exceptions: none
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*/
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int gsl_sf_lncosh_e(const double x, gsl_sf_result * result);
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double gsl_sf_lncosh(const double x);
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/* Convert polar to rectlinear coordinates.
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*
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* exceptions: GSL_ELOSS
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*/
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int gsl_sf_polar_to_rect(const double r, const double theta, gsl_sf_result * x, gsl_sf_result * y);
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/* Convert rectilinear to polar coordinates.
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* return argument in range [-pi, pi]
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*
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* exceptions: GSL_EDOM
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*/
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int gsl_sf_rect_to_polar(const double x, const double y, gsl_sf_result * r, gsl_sf_result * theta);
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/* Sin(x) for quantity with an associated error.
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*/
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int gsl_sf_sin_err_e(const double x, const double dx, gsl_sf_result * result);
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/* Cos(x) for quantity with an associated error.
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*/
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int gsl_sf_cos_err_e(const double x, const double dx, gsl_sf_result * result);
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/* Force an angle to lie in the range (-pi,pi].
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*
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* exceptions: GSL_ELOSS
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*/
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int gsl_sf_angle_restrict_symm_e(double * theta);
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double gsl_sf_angle_restrict_symm(const double theta);
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/* Force an angle to lie in the range [0, 2pi)
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*
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* exceptions: GSL_ELOSS
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*/
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int gsl_sf_angle_restrict_pos_e(double * theta);
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double gsl_sf_angle_restrict_pos(const double theta);
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int gsl_sf_angle_restrict_symm_err_e(const double theta, gsl_sf_result * result);
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int gsl_sf_angle_restrict_pos_err_e(const double theta, gsl_sf_result * result);
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__END_DECLS
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#endif /* __GSL_SF_TRIG_H__ */
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