Find `(dy)/(dx)`, if `x=acostheta,y=asintheta`.

Explanation

To find \(\frac{dy}{dx}\) given the parametric equations \(x = a \cos \theta\) and \(y = a \sin \theta\), we will use the chain rule for differentiation.

### Step 1: Differentiate \(x\) with respect to \(\theta\)

Given:
\[ x = a \cos \theta \]
...