acos.hpp

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// SPDX-License-Identifier: BSD-2-Clause
 
#ifndef pRC_CORE_COMPLEX_FUNCTIONS_ACOS_H
#define pRC_CORE_COMPLEX_FUNCTIONS_ACOS_H
 
#include <prc/core/complex/complex.hpp>
#include <prc/core/value/functions/pi.hpp>
 
namespace pRC
{
    template<IsComplex T>
    static inline constexpr auto acos(T const &a)
    {
        using R = typename T::Type;
 
        auto const t = asin(a);
        auto const real = pi<R>() / identity<R>(2) - t.real();
        auto const imag = t.imag();
 
        return Complex(real, imag);
    }
}
#endif // pRC_CORE_COMPLEX_FUNCTIONS_ACOS_H