# What is the derivative of #sqrt(x^2-1)#?

##### 1 Answer

Feb 14, 2017

#### Explanation:

Let's equate the function to a variable

Now, I'll take another variable

So that makes the

Now, we are to find the derivative of

Now, we can use chain rule to simplify our problem as

That makes it,

Now, we know that for any Real value

, and that the derivative of a constant is zero. So

Now,