Solve: `cot2theta=tantheta`

Explanation

To solve the equation \( \cot(2\theta) = \tan(\theta) \), we can follow these steps:

### Step 1: Rewrite the cotangent in terms of tangent
We know that:
\[ \cot(2\theta) = \frac{1}{\tan(2\theta)} \]
Thus, we can rewrite the equation as:
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