Draw the graph of `y=sec^(2)x-tan^(2)x.` Is `f(x)` periodic? If yes, what is its fundamental period?

Explanation

To solve the problem of drawing the graph of \( y = \sec^2 x - \tan^2 x \) and determining if the function is periodic, we will follow these steps:

### Step 1: Write the function
We start with the function:
\[ y = \sec^2 x - \tan^2 x \]

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