Find the real roots of the equation `cos^4x + sin^7x = 1` in the interval `[-pi,pi]`

Explanation

To find the real roots of the equation \( \cos^4 x + \sin^7 x = 1 \) in the interval \([-π, π]\), we can follow these steps:

### Step 1: Rearranging the Equation
We start with the equation:
\[ \cos^4 x + \sin^7 x = 1 \]
We can rearrange it to isolate one of the terms:
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