/usr/include/itpp/base/math/trig_hyp.h is in libitpp-dev 4.3.1-8.
This file is owned by root:root, with mode 0o644.
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* \file
* \brief Trigonometric and hyperbolic functions - header file
* \author Tony Ottosson and Adam Piatyszek
*
* -------------------------------------------------------------------------
*
* Copyright (C) 1995-2010 (see AUTHORS file for a list of contributors)
*
* This file is part of IT++ - a C++ library of mathematical, signal
* processing, speech processing, and communications classes and functions.
*
* IT++ is free software: you can redistribute it and/or modify it under the
* terms of the GNU General Public License as published by the Free Software
* Foundation, either version 3 of the License, or (at your option) any
* later version.
*
* IT++ is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License along
* with IT++. If not, see <http://www.gnu.org/licenses/>.
*
* -------------------------------------------------------------------------
*/
#ifndef TRIG_HYP_H
#define TRIG_HYP_H
#include <itpp/base/help_functions.h>
#include <itpp/itexports.h>
namespace itpp
{
//!\addtogroup trifunc
//!@{
//! Sinc function: sinc(x) = sin(pi*x)/pi*x
inline double sinc(double x)
{
if (x == 0) {
return 1.0;
}
else {
double pix = itpp::pi * x;
return sin(pix) / pix;
}
}
//! Sine function
inline vec sin(const vec &x) { return apply_function<double>(std::sin, x); }
//! Sine function
inline mat sin(const mat &x) { return apply_function<double>(std::sin, x); }
//! Cosine function
inline vec cos(const vec &x) { return apply_function<double>(std::cos, x); }
//! Cosine function
inline mat cos(const mat &x) { return apply_function<double>(std::cos, x); }
//! Tan function
inline vec tan(const vec &x) { return apply_function<double>(std::tan, x); }
//! Tan function
inline mat tan(const mat &x) { return apply_function<double>(std::tan, x); }
//! Inverse sine function
inline vec asin(const vec &x) { return apply_function<double>(std::asin, x); }
//! Inverse sine function
inline mat asin(const mat &x) { return apply_function<double>(std::asin, x); }
//! Inverse cosine function
inline vec acos(const vec &x) { return apply_function<double>(std::acos, x); }
//! Inverse cosine function
inline mat acos(const mat &x) { return apply_function<double>(std::acos, x); }
//! Inverse tan function
inline vec atan(const vec &x) { return apply_function<double>(std::atan, x); }
//! Inverse tan function
inline mat atan(const mat &x) { return apply_function<double>(std::atan, x); }
//! Sinc function, sin(pi*x)/(pi*x)
inline vec sinc(const vec &x) { return apply_function<double>(sinc, x); }
//! Sinc function, sin(pi*x)/(pi*x)
inline mat sinc(const mat &x) { return apply_function<double>(sinc, x); }
//!@}
//!\addtogroup hypfunc
//!@{
//! Sine hyperbolic function
inline vec sinh(const vec &x) { return apply_function<double>(std::sinh, x); }
//! Sine hyperbolic function
inline mat sinh(const mat &x) { return apply_function<double>(std::sinh, x); }
//! Cosine hyperbolic function
inline vec cosh(const vec &x) { return apply_function<double>(std::cosh, x); }
//! Cosine hyperbolic function
inline mat cosh(const mat &x) { return apply_function<double>(std::cosh, x); }
//! Tan hyperbolic function
inline vec tanh(const vec &x) { return apply_function<double>(std::tanh, x); }
//! Tan hyperbolic function
inline mat tanh(const mat &x) { return apply_function<double>(std::tanh, x); }
//! Inverse sine hyperbolic function
ITPP_EXPORT vec asinh(const vec &x);
//! Inverse sine hyperbolic function
ITPP_EXPORT mat asinh(const mat &x);
//! Inverse cosine hyperbolic function
ITPP_EXPORT vec acosh(const vec &x);
//! Inverse cosine hyperbolic function
ITPP_EXPORT mat acosh(const mat &x);
//! Inverse tan hyperbolic function
ITPP_EXPORT vec atanh(const vec &x);
//! Inverse tan hyperbolic function
ITPP_EXPORT mat atanh(const mat &x);
//!@}
} // namespace itpp
#endif // #ifndef TRIG_HYP_H
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