Function acosh

extern/half/include/half.hpp:2505–2505

Hyperbolic area cosine. \param arg function argument \return area cosine value of \a arg template typename enable ::type acosh(T arg) { return functions::acosh(arg); }

		/// \return area cosine value of \a arg
//		template<typename T> typename enable<expr,T>::type acosh(T arg) { return functions::acosh(arg); }
		inline expr acosh(half arg) { return functions::acosh(arg); }
		inline expr acosh(expr arg) { return functions::acosh(arg); }

		/// Hyperbolic area tangent.