If `sintheta + 2 costheta=1`,then prove that `2sintheta-costheta=2`.

Explanation

To prove that \( 2\sin\theta - \cos\theta = 2 \) given that \( \sin\theta + 2\cos\theta = 1 \), we can follow these steps:

### Step 1: Start with the given equation
We have:
\[ \sin\theta + 2\cos\theta = 1 \]

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