# How do you find the x intercepts for #y=sec^2x-1#?

##### 1 Answer

Aug 1, 2016

#### Explanation:

Note that

Also, note that the only way for

So, when is it zero? If you remember the unit circle, you can see that

Hence, you want

Here's a graphical representation:

graph{tanx [-10, 10, -5, 5]}