Hi,

I'm not sure how or which identities to use to solve the following question:

Express $\displaystyle sinh^5x$ in terms of hyperbolic sines of multiples of $\displaystyle x$.

The answer is: $\displaystyle \frac{1}{16}(sinh\ x-5sinh\ 3x+10sinh\ x)$

I have a fair few similar problems, so if you could please show me the steps for this one I should hopefully be able to solve the others.

Thanks heaps for your help.