Complex Hyperbolic Trigonometry Proofs: cos(iz) = cosh(z) and cosh(iz) = cos(z)
Hyperbolic Trig Functions - Basic Introduction
Hyperbolic Sine & Cosine
The applications of hyperbolic trig | Why do we even care about these things?
Why hyperbolic functions are actually really nice
Relations between cos cosh sin sinh
Hyperbolic Functions: Definitions, Identities, Derivatives, and Inverses
Definitions of Cosh and Sinh
Hyperbolic trig functions | MIT 18.01SC Single Variable Calculus, Fall 2010
Osborn's Rule || cos iz = cosh z || Complex Numbers
Complex definitions of sine and cosine
Derivative of cosh(x)
Prove that the Hyperbolic Cosine Function is Even: cosh(-u) = cosh(u)
A Perspective on sinh (x) & cosh (x) Definitions (hyperbolics)
How to integrate cos(ix): The hyperbolic cosine function cosh(x).
How to Calculate Cosh, Sinh, Tanh on Casio fx991ex Calculator
Introduction to Hyperbolic Trig Functions
Inverse cosh(x)
sinh(ix) and cosh(ix) each has a nice identity. the hyperbolic cosine
Prove the identity cosh(x+y) = cosh x cosh y + sinh x sinh y. Hyperbolic functions