The real roots of the equation `cos^7x+sin^4x=1` in the interval `(-pi,pi)` are __________, ________, and ________

Explanation

To solve the equation \( \cos^7 x + \sin^4 x = 1 \) for real roots in the interval \( (-\pi, \pi) \), we can follow these steps:

### Step 1: Rearranging the Equation
Start by rearranging the equation:
\[ \cos^7 x = 1 - \sin^4 x \]