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Here, only one (principal) branch of the function arccosh^ is listed, the function itself being double-valued. In order to write out both branches of arccosh x. the symbol ± should be placed before the logarithm on the right-hand side of the formula. | Andrei D. Polyanin Alexander V. Manzhirov HANDBOOK OF MATHEMATICS FOR ENGINEERS AND SCIENTISTS Chapman Hall CRC Taylor Francis Group HANDBOOK OF MATHEMATICS FOR ENGINEERS AND .
