Solve:
`cos^(2)theta-sinthetacostheta-1/2=0`

Explanation

To solve the equation \( \cos^2 \theta - \sin \theta \cos \theta - \frac{1}{2} = 0 \), we can follow these steps:

### Step 1: Rewrite the equation
We start with the given equation:
\[ \cos^2 \theta - \sin \theta \cos \theta - \frac{1}{2} = 0 \]

...