Differentiate the following :
(ii)`sec(ax+b)`

Explanation

To differentiate the function \( y = \sec(ax + b) \), we will use the chain rule of differentiation. Here are the steps to solve the problem:

### Step 1: Identify the outer and inner functions
In the function \( y = \sec(ax + b) \), the outer function is \( \sec(u) \) where \( u = ax + b \).

### Step 2: Differentiate the outer function
The derivative of \( \sec(u) \) with respect to \( u \) is:
\[
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