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MathsCasts: Writing Composite Trigonometric Functions as Algebraic Expressions
(Swinburne Commons, 2012)
Several examples are given of rewriting composite circular functions, where the inner function is an inverse trigonometric function, as an algebraic function in terms of x.
MathsCasts: The Relationship Between Cosh (x) and Sinh (x)
(Swinburne Commons, 2012)
A demonstration of how to apply the identity (cosh(x))^2-(sinh(x))^2 = 1 and the graphical properties of sinh(x) and cosh(x) to finding sinh(x) if cosh(x) is known and vice versa.