If `x=acos^3theta,y=a sin^3theta` then find `(d^2y)/(dx^(2))`

Explanation

To find the second derivative \(\frac{d^2y}{dx^2}\) for the given parametric equations \(x = a \cos^3 \theta\) and \(y = a \sin^3 \theta\), we will follow these steps:

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

Given:
\[ x = a \cos^3 \theta \]
...