We know that hyperbolic sine is: $$\sinh \theta={\frac {e^{\theta}-e^{-\theta}}{2}}$$ and that hyperbolic cosine is $$\cosh \theta={\frac {e^{\theta}+e^{-\theta}}{2}}$$ Let $n\in\mathbb N$.
If $x=\sinh{\theta}$, is it possible to express $\cosh{n\theta}$ and $\sinh{n\theta}$ in terms of $x$?