Define `y=cos^(-1)(4x^(3)-3x)` in terms of `cos^(-1)x`

Explanation

To define \( y = \cos^{-1}(4x^3 - 3x) \) in terms of \( \cos^{-1}(x) \), we can follow these steps:

### Step 1: Substitute \( x \) with \( \cos(\theta) \)
Let \( x = \cos(\theta) \). Then, we can express \( 4x^3 - 3x \) in terms of \( \theta \):
\[ 4x^3 - 3x = 4\cos^3(\theta) - 3\cos(\theta) \]

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