If `x=acos^3theta` and `y=asin^3theta,` then find the value of `(d^2y)/(dx^2)` at `theta=pi/6dot`

Explanation

To find the value of \(\frac{d^2y}{dx^2}\) at \(\theta = \frac{\pi}{6}\), we will follow these steps:

### Step 1: Find \(\frac{dx}{d\theta}\) and \(\frac{dy}{d\theta}\)

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