Differentiate w.r.t x using quotient rule .
`(sec x -1)//( sec x+1)`

Explanation

To differentiate the function \( y = \frac{\sec x - 1}{\sec x + 1} \) with respect to \( x \) using the quotient rule, we follow these steps:

### Step 1: Identify \( u \) and \( v \)
Let:
- \( u = \sec x - 1 \)
- \( v = \sec x + 1 \)

### Step 2: Differentiate \( u \) and \( v \)
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