# Revision history [back]

### How to expand the result of derivative()?

I ran:

 derivative(acosh(x), x) 

and the result was:

 1/(sqrt(x + 1)*sqrt(x - 1)) 

I personally would prefer 1/sqrt(x^2-1) as it's an expanded form and I'm wondering how I can get SageMath to show this. I've tried adding .expand() afterwards and that made no difference to the result.