It also has built-in functions for tangent and hyperbolic tangent, ... Type "=" to begin entering a function into the cell, type "1/" to enter the inverse of a value and type "COS(A2)".

The purpose of this course is to teach functions, limits, continuity, derivatives, polynomial, rational, exponential, hyperbolic, logarithmic, trigonometric and inverse trigonometric functions.

Nature - Standard Four-Figure Mathematical Tables: including many New Tables, Trigonometrical Functions for Radians, Inverse Trigonometrical and Hyperbolic Functions, ...