Differentiate `(sinx)/(x)` from the first principle .

Explanation

To differentiate \( \frac{\sin x}{x} \) from the first principle, we will follow these steps:

### Step 1: Define the function
Let \( y = \frac{\sin x}{x} \).

### Step 2: Increment in \( y \)
Let \( \Delta x \) be a small increment in \( x \). Then the increment in \( y \), denoted as \( \Delta y \), can be expressed as:
\[
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