Abstract
This chapter provides an overview of inverse trigonometrical functions. The concept of the inverse of a function is a natural complement of the function concept and, moreover, introduces a convenient notation. Geometrically, the process of establishing an inverse function is equivalent to a reflection in the line y = x. Each inverse trigonometrical function is defined to be single-valued, that is, to one value of x there corresponds just one value of the inverse function. The chapter presents the ranges of definition of the main inverse trigonometrical functions.
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