# How do you find the derivative of #sqrt(x^2-1)#?

##### 1 Answer

Mar 13, 2016

#### Answer:

Use the power rule and chain rule to get

#### Explanation:

Recognize that

We also need to use the chain rule; the derivative of the "inside" function (

Canceling the

Since the problem was given to us in radical form, convert back to get the final answer: