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C++ Libraries“...one of the most highly regarded and expertly designed C++ library projects in the world.” — Herb Sutter and Andrei Alexandrescu, C++ Coding Standards
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#include <boost/math/complex/atan.hpp>
template<class T> std::complex<T> atan(const std::complex<T>& z);
Effects: returns the inverse tangent of the complex number z.
Formula: 