cos_poly_quarterturn_()

template<typename F>

F fl::detail::cos_poly_quarterturn_ ( F x )

inline

Definition at line 177 of file math.cpp.hpp.

                                                {
    // cos(x) ≈ 1 - x²/2 + x⁴/24 - x⁶/720
    const F x2 = x * x;
    return F(1) - x2 * (F(0.5) - x2 * (F(1.0 / 24.0) - x2 * F(1.0 / 720.0)));
}

References FL_NOEXCEPT, and fl::x.